Refresh documentation and policies and simplify releases

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# Agent Policy
**Base Policy Version:** 1.0
**Last Updated**: 2026-09-23
## Purpose
Agents working in this repository must read and adhere to the following house rules.
## Implementation Discipline
**KEY PRINCIPLES:** Write the simplest idiomatic code that satisfies the user's
request. Do not implicitly strengthen requirements, restrictions, or guarantees
beyond what the user actually requested.
**Keep implementation machinery proportionate.** Use straightforward,
idiomatic code and introduce only the machinery needed to support the requested
behavior and flexibility. Optimize for conceptual simplicity and
maintainability, not for the fewest lines, fewest options, or narrowest product
surface.
**Do not invent restrictions.** Do not reject, prohibit, constrain, cap,
harden, or otherwise narrow behavior unless required by the user, an explicit
repository contract, or an unavoidable correctness constraint. Preserve
operator and caller choice where policy has not been established. If an
additional restriction appears advisable, present it as a decision rather than
silently implementing it.
**Do not invent guarantees.** Do not strengthen public contracts, guarantees,
or invariants beyond those expressly requested by the user.
**Use the standard library.** For example: in almost every case, the best
approach to copying files is to use the standard library. Writing custom code to
implement power-loss protection at the application level, or to guard against
bad actors with privileged and concurrent access to the host's filesystem,
is wasteful, unnecessary, and not idiomatic. Stick to the simple, standard, and
idiomatic approach unless another path is expressly requested by the user.
**An implementation detail is not repository policy.** Tests and documentation
must not elevate incidental behavior into a durable guarantee or restriction
unless that behavior was expressly selected as part of the contract.
## Codebase Discovery
This project uses codebase-memory-mcp to maintain a knowledge graph of the
codebase. Always prefer its graph tools over grep, glob, or file search for code discovery.
If the project is not indexed, run `index_repository` first.
Use this order:
1. `search_graph` to find functions, classes, routes, and variables by pattern.
2. `trace_path` to trace callers and callees.
3. `get_code_snippet` to read a specific function or class.
4. `query_graph` for complex graph queries.
5. `get_architecture` for the high-level project summary.
Fall back to grep or glob for string literals, error messages, configuration
values, non-code files, or when the graph tools return insufficient results.
Examples:
- Find a handler: `search_graph(name_pattern=".*OrderHandler.*")`.
- Find callers: `trace_path(function_name="OrderHandler", direction="inbound")`.
- Read source: `get_code_snippet(qualified_name="pkg/orders.OrderHandler")`.
## Git Commit Policy
This policy applies to all coding agents and agent harnesses working in this
repository, not only Codex.
By default, create a commit after completing each coherent unit of work, using a
concise, plain-English message describing what changed. This policy is standing
authorization to create those local commits; a separate user request is not
required. An explicit user instruction to leave work uncommitted takes precedence.
A unit of work is a focused, reviewable outcome, including its relevant tests and
documentation. Do not commit after every intermediate edit or create empty commits.
Complete the appropriate validation before committing. If work is incomplete or
validation is blocked, report that state rather than presenting it as completed.
Before committing:
1. Run `git status --short` and review the relevant diff, including any staged
changes. Identify changes that predate the current unit of work.
2. Exclude secrets, local environment files, generated junk, and unrelated changes.
3. Stage only the files or hunks belonging to the completed unit. Use `git add .`
only when every included change belongs to that unit. Do not disturb unrelated
staged or unstaged work.
4. Review `git diff --staged` and run appropriate checks for the change. Do not
repeat checks already passed for unchanged content merely to create a commit.
5. Review `git log --oneline -n 10` and use
`git commit -m "<concise plain-English commit message>"`.
6. Report the commit identifier and any remaining uncommitted work.
If the unit cannot be safely separated from pre-existing work, leave it uncommitted
and explain the overlap rather than silently including that work. If a commit
fails, preserve the changes and report the failure; do not bypass hooks.
Default commit authorization does not authorize pushing, publishing, amending,
resetting, reverting, or rewriting history. Those actions require a separate user
instruction. Do not use `git commit -a` or `git commit --no-verify` to bypass the
staging and validation discipline above.

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# Architecture Policy
## Purpose
This document defines Audita's development architecture and invariants for maintainers and LLM coding agents. It describes how the project is intended to be changed safely, based on behavior implemented in this repository today.
User-facing behavior belongs in the README and focused runtime docs. Future or proposed work belongs only under `docs/roadmap/`.
## Project Shape
Audita is a single-process Go CLI for transcript polishing. The executable entrypoint is `cmd/audita`; command handling lives in `internal/cli`.
The implemented `audita process` flow is:
1. load effective config;
2. read and validate transcript JSON and glossary YAML;
3. normalize transcript segments;
4. chunk the working transcript into sections;
5. resolve configured module instances;
6. run correction modules and validator chains;
7. apply approved proposals deterministically;
8. write transcript output, reports, and diagnostics artifacts.
The current built-in modules are `glossary`, `homophones`, `spoken_word`, and `grammar`. The default configured module sequence repeats `glossary`.
For external behavior and compatibility details, prefer links to existing behavior docs:
- [CLI reference](../cli.md)
- [Configuration](../config.md)
- [Operations](../operations.md)
- [Troubleshooting](../troubleshooting.md)
- [Integration docs](../integrations/subprocess.md)
- [Internal docs](../internal/overview.md)
## Core Design Principles
- **Hexagonal architecture:** keep domain behavior behind narrow internal contracts. CLI, filesystem, config loading, diagnostics writing, and LLM transport are adapters around the core processing flow.
- **Composable modules and validators:** correction stages and validators should remain small, explicit, and independently testable.
- **Deterministic orchestration around LLM calls:** LLM responses are nondeterministic inputs. Proposal indexing, validator ordering, proposal application, reports, and output serialization must remain deterministic.
- **Bounded and observable concurrency:** use the implemented schedulers and configured concurrency limits for LLM call sites. Preserve utilization diagnostics when changing scheduling or orchestration.
- **Conservative correction behavior:** validate proposed corrections before application; apply accepted proposals through deterministic apply-time safety checks.
- **Standard-library-first:** prefer the Go standard library. Narrow third-party dependencies are acceptable when they materially improve maintainability, such as `gopkg.in/yaml.v3` for YAML parsing.
- **Current-behavior documentation:** non-roadmap docs must describe implemented behavior only.
## Architectural Boundaries
`internal/core` owns domain data handling and stable runtime contracts that do not require CLI or provider transport knowledge:
- config defaults, loading, validation, redaction, and catalogs;
- transcript and glossary schemas;
- normalization and chunking;
- output-schema encoding;
- diagnostics artifact naming and run-directory helpers;
- public process report shapes.
`internal/framework` owns orchestration contracts and reusable runtime mechanics:
- module and validator interfaces;
- proposal generation, proposal application, and prompt context;
- runner orchestration;
- LLM scheduler, OpenAI-compatible adapter, redaction helpers, and diagnostics writers;
- structured response schema registry;
- process report and correction-ledger assembly.
`internal/modules/*` owns module-specific correction stages. `internal/validators/*` owns built-in validator implementations, registry, chains, and execution-class metadata. `internal/prompts` owns embedded prompt assets and prompt metadata.
`internal/cli` owns command parsing, exit codes, stdout/stderr behavior, config command behavior, filesystem input/output wiring, and top-level process orchestration. CLI concerns should not move into modules, validators, or schema logic.
Tests should stay close to the behavior they protect. Shared test helpers are acceptable when they remove clear duplication without hiding module-specific behavior.
## Modules and Validators
Modules implement `contracts.TranscriptModule`. A module must provide:
- a stable key;
- a replacement policy;
- a validator chain;
- proposal generation from explicit request inputs.
Module packages should stay separate. Do not collapse module-specific prompts, scope, or validation choices into a broad generic stage abstraction.
Validators implement the shared validator contract and return one decision per candidate proposal. Deterministic validators and LLM-backed validators are both composable chain elements. Validator identity and execution class metadata are stable enough to affect ordering, diagnostics, reports, and correction-ledger classification.
Future module or validator changes should preserve:
- explicit inputs and outputs;
- no hidden global state;
- explicit config dependencies;
- deterministic proposal index handling;
- validation before final mutation;
- stable reason codes and validator keys where already exposed.
## LLM Integration and Concurrency
LLM calls are external effects behind narrow contracts. Production structured completions use `contracts.StructuredLLMClient`; the implemented provider adapter is OpenAI-compatible HTTP code in `internal/framework/llm`.
Structured response schemas are registered in `internal/framework/responseschema`. Provider-side schema enforcement is not a substitute for local validation: Audita still validates proposal structure, validator decision cardinality, and apply-time safety.
Concurrency is bounded by configured scheduler limits:
- total LLM concurrency;
- proposal LLM concurrency;
- validation LLM concurrency.
The scheduler is context-aware and releases permits on success, failure, and cancellation. Runner code may collect section-level work concurrently, but transcript mutation is applied later in deterministic proposal-index order.
Diagnostics for LLM interactions should be useful for debugging without leaking configured secrets. Use the existing redaction helpers and `llm.ConfiguredSecrets`.
## State, Inputs, and Outputs
Audita does not implement resume, checkpoint, manifest, or remote storage behavior. Runtime state is in memory plus per-run diagnostics artifacts written under the configured work directory.
Transcript input accepts the implemented JSON forms documented in the public contract. Parsed source transcripts are normalized into Audita's internal transcript shape before chunking and module execution.
Proposals and validator decisions are intermediate runtime data. Approved proposals are applied through `internal/framework/proposals`, which clones transcript state, orders by proposal index, and records applied or skipped changes.
Transcript output is encoded through `internal/core/outputschema`. Reports and correction ledgers are machine-readable artifacts derived from runner outputs; their public shape should not be changed casually.
## Configuration and CLI Boundaries
Config behavior is owned by `internal/core/config`; command usage and process wiring are owned by `internal/cli`.
`audita process` uses implemented precedence: defaults, config file, environment, then CLI flags. `config validate` validates defaults plus a file config and intentionally does not apply environment overrides. `config print-effective` applies defaults, file config, and environment overrides, then prints redacted JSON.
Do not duplicate full CLI or config reference material here. Use [Configuration](../config.md), [CLI reference](../cli.md), [Operations](../operations.md), and integration docs under [`docs/integrations/`](../integrations/subprocess.md) for current external behavior.
When adding config fields or CLI flags, update:
- config defaults, file/env/CLI application, and validation;
- CLI flag extraction if applicable;
- redaction when secrets are involved;
- tests for precedence and source-specific behavior;
- user-facing docs if external behavior changes.
## Errors, Logging, and Diagnostics
Errors should be phase-specific enough for CLI users and subprocess callers. The CLI writes human-readable errors to stderr and preserves transcript JSON-only stdout behavior on successful stdout output.
Run diagnostics are best-effort after run-directory creation. Failed runs are retained. Successful run retention follows the implemented work-dir retention policy.
Diagnostics and reports must not leak configured LLM secrets. Config redaction and LLM payload/error redaction are separate responsibilities and should remain separate.
Process reports, diagnostics metadata, utilization diagnostics, and correction ledgers are part of the public contract. Prefer additive, compatible changes.
## Testing Expectations
Use targeted package tests for touched behavior and `go test ./...` for substantial changes.
When changing modules, inspect or add:
- package-local module tests under `internal/modules/*`;
- prompt rendering or proposal-generation tests when prompt inputs change;
- parity or release fixtures when public output behavior changes.
When changing validators, inspect or add:
- validator package tests;
- registry and chain tests under `internal/validators`;
- framework validator tests for batching, malformed output, diagnostics, and cardinality.
When changing LLM integration or concurrency, inspect or add:
- `internal/framework/llm` scheduler/client/redaction tests;
- `internal/framework/runner` orchestration and utilization tests;
- structured-output malformed classification tests.
When changing config, CLI, schema, output, reports, or diagnostics, inspect or add:
- `internal/core/config` tests;
- CLI tests under `internal/cli`;
- schema and output-schema tests under `internal/core`;
- report, diagnostics, parity, and release-fixture tests.
## Dependency Policy
Audita should remain dependency-light. Prefer standard-library solutions for CLI parsing, HTTP, JSON, filesystem, synchronization, and tests.
Third-party dependencies should be narrow, justified, and preferably de facto standard for their purpose. YAML parsing is the current direct dependency exception.
Do not add broad frameworks for CLI, dependency injection, workflow orchestration, logging, or plugin systems without a concrete implemented need and focused tests.
## Documentation Expectations
Follow [Documentation Policy](./documentation.md). Architecture policy must stay concise and aligned with implemented behavior.
Do not use architecture docs as changelogs. Do not describe planned modules, adapters, modes, persistence, or configuration unless they are implemented. Put future work under `docs/roadmap/`.
## Architectural Invariants
- Keep LLM transport behind `StructuredLLMClient` and framework adapter boundaries.
- Keep correction modules narrowly scoped and package-separated.
- Keep validators modular, composable, and identified by stable keys.
- Keep CLI/config/filesystem concerns out of module and validator domain logic.
- Preserve deterministic transcript mutation and output handling around nondeterministic LLM calls.
- Keep LLM concurrency bounded, configurable, and observable where implemented.
- Keep run diagnostics and reports redacted and machine-readable.
- Keep public CLI, config, output-schema, diagnostics, report, prompt, module, and validator contracts stable unless a change is explicit and tested.
- Prefer small shared helpers over broad rewrites.
- Avoid new dependencies unless they are narrow and clearly justified.
## Non-Goals
- No plugin framework is implemented.
- No generic workflow engine is implemented.
- No resume, checkpoint, manifest, or remote storage system is implemented.
- No multi-process service mode is implemented.
- No provider SDK abstraction beyond the current structured LLM client contract and OpenAI-compatible HTTP adapter is implemented.
**Base Policy Version:** 1.0
**Last Updated**: 2026-09-23
## Purpose and System Shape
Audita is a single-process Go CLI for transcript polishing. Its architecture
separates deterministic transcript processing from external LLM effects through
narrow contracts and adapters. Correction modules and validators remain explicit,
composable components in an ordered processing pipeline.
This policy owns architectural requirements. The [internal overview](../internal/overview.md)
owns the implemented component inventory and links to runtime mechanics.
[CLI](../cli.md), [configuration](../config.md), [operations](../operations.md),
and [integration documentation](../integrations/subprocess.md) own external contracts.
## Ownership and Dependency Direction
- **Core:** owns domain data handling and reusable configuration, schema,
normalization, chunking, output, diagnostics, and reporting contracts. Domain
behavior must not require CLI or provider-transport knowledge.
- **Framework:** owns orchestration contracts and shared runtime mechanics for
modules, validators, proposals, LLM adapters, scheduling, and report assembly.
It composes domain operations through explicit inputs and outputs.
- **Modules:** own narrowly scoped correction behavior and module-specific prompt
choices. Keep module packages separate rather than collapsing their distinct
responsibilities into a broad generic stage abstraction.
- **Validators:** own validation behavior and composition. Deterministic and
LLM-backed validators remain explicit, independently composable elements.
- **Prompts:** own embedded prompt assets and metadata used by the runtime.
- **CLI and adapters:** own command parsing, streams, filesystem wiring, and
transport. Keep these concerns outside module, validator, and schema logic.
LLM transport belongs behind `StructuredLLMClient` and framework adapter
boundaries. Prefer small shared helpers over broad rewrites. Keep module and
validator inputs, outputs, and configuration dependencies explicit, without
hidden global state.
## Correction and Concurrency Invariants
- Treat LLM responses as nondeterministic inputs. Preserve deterministic proposal
indexing, validator ordering, transcript mutation, reports, and serialization.
- Validate corrections before final mutation, including local proposal checks,
decision cardinality, and apply-time safety. Provider-side schema enforcement
does not replace these checks.
- Keep concurrency bounded, configurable, context-aware, and observable through
the existing scheduler and utilization diagnostics. Preserve permit release on
success, failure, and cancellation.
- Keep module and validator identities, reason codes, and execution-class
distinctions stable where exposed as contracts.
The [pipeline](../internal/pipeline.md), [modules](../internal/modules.md),
[validators](../internal/validators.md), and [LLM runtime](../internal/llm-runtime.md)
describe how these requirements are implemented.
## State and Compatibility
Keep transcript mutation and output handling deterministic around external
calls. Reports and correction ledgers are derived from processing results.
Preserve the separation between transient processing state and filesystem
adapters; physical artifact placement and retention belong to
[operations](../operations.md).
Public CLI, configuration, output-schema, diagnostics, report, prompt, module,
and validator contracts should remain stable unless a change is deliberate and
tested. Prefer additive, compatible report changes. Current implementation
limits are documented in the [internal overview](../internal/overview.md#current-scope);
they are not additional prohibitions on future development.
## Errors and Secret Handling
Errors should identify the failed processing phase sufficiently for users and
subprocess callers. Preserve the stream and exit behavior defined by the
[CLI contract](../cli.md) and the artifact handling defined by
[operations](../operations.md).
Diagnostics, reports, and surfaced errors must not leak configured LLM secrets.
Configuration redaction and LLM payload/error redaction have separate
responsibilities and should remain separate. Implementation details belong in
[diagnostics and reporting](../internal/diagnostics-reporting.md).
## Dependencies
Keep Audita dependency-light and prefer the Go standard library for CLI parsing,
HTTP, JSON, filesystems, synchronization, and tests. Third-party dependencies
should be narrow, justified, and preferably established for their purpose.
YAML parsing is the existing direct dependency exception.
Do not introduce broad CLI, dependency-injection, workflow, logging, or plugin
frameworks without a concrete implemented need and focused tests.
## Testing and Documentation
Follow the [testing policy](testing.md) for risk-based sufficiency and stable test
boundaries. Keep tests close to the behavior they protect; shared helpers should
remove duplication without obscuring component-specific behavior. Relevant
internal docs identify component tests and change recipes; the
[contributor guide](../development.md) provides baseline validation commands.
Follow the [documentation policy](documentation.md) for ownership, current versus
future behavior, and the ADR lifecycle. Keep architecture concise and normative;
use the roadmap for implementation plans rather than maintaining a changelog or
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# Audita Development Workflow
## Scope
This is the canonical contributor workflow for Audita maintainers and coding agents.
It defines:
- repository layout and boundaries;
- setup and test commands;
- expectations for code changes;
- how to add config, CLI, modules, validators, docs, and examples.
## Setup
Prerequisites:
- Go `1.24` or newer.
Common commands:
```sh
go test ./...
go build ./cmd/audita
```
## Repository Layout
Top-level areas:
- `cmd/audita`: executable entrypoint.
- `internal/cli`: command parsing and process/config command orchestration.
- `internal/core`: deterministic config/schema/normalization/chunking/output/diagnostics/reporting logic.
- `internal/framework`: runner orchestration, contracts, proposal generation/application, validators runtime, LLM runtime, response schemas.
- `internal/modules/*`: module-specific correction behavior.
- `internal/validators/*`: validator implementations, chains, and metadata.
- `internal/prompts`: embedded prompts and prompt metadata.
- `docs/`: canonical documentation.
- `examples/`: maintained copyable inputs/configs.
## Change Workflow
1. Confirm scope and behavior contract before editing.
2. Make focused changes in the appropriate ownership area.
3. Add or update tests for changed behavior.
4. Run targeted package tests for touched areas.
5. Run `go test ./...` for substantial changes.
6. Update docs/examples when external behavior changes.
## How To Add or Change Configuration
1. Add fields/defaults/validation under `internal/core/config`.
2. Apply source precedence correctly (defaults, file, env, CLI for `process`).
3. Ensure `config validate` remains file-only and `config print-effective` remains redacted.
4. Update tests in `internal/core/config` and related CLI tests.
5. Update [`docs/config.md`](../config.md) and relevant examples under `examples/`.
## How To Add or Change CLI Behavior
1. Implement parsing/wiring in `internal/cli`.
2. Keep stdout/stderr and exit behavior compatible unless intentional and documented.
3. Update CLI tests under `internal/cli` and integration tests under `cmd/audita`.
4. Update [`docs/cli.md`](../cli.md) and related integration docs.
## How To Add or Change Modules
1. Add or update one module package under `internal/modules/<module_key>`.
2. Keep module-specific prompt ownership in the module + `internal/prompts`.
3. Wire module registration/catalog resolution through framework/core module catalog code.
4. Verify replacement policy and validator chain selection.
5. Add/update module tests and proposal-generation tests.
6. Update internal docs when behavior/contracts change.
## How To Add or Change Validators
1. Implement validator behavior in `internal/validators` and shared runtime pieces in `internal/framework/validators` only when needed.
2. Preserve stable validator keys and decision semantics where already exposed.
3. Keep deterministic vs LLM-backed execution-class behavior explicit.
4. Add/update validator, chain, batching, and malformed-output tests.
5. Update validator documentation when external or developer-facing behavior changes.
## Documentation and Examples Expectations
- Keep one canonical home per topic (see [`docs/policy/documentation.md`](documentation.md)).
- Do not document future/unimplemented behavior outside `docs/roadmap/`.
- Keep command examples and config/examples in sync with current code.
- Keep examples secret-free and copyable.
## Practical Validation Checklist
Use this checklist for meaningful runtime-impacting changes:
1. Run core tests:
```sh
go test ./...
```
2. Verify config commands and examples:
```sh
go run ./cmd/audita config validate --config examples/minimal-config.yml
go run ./cmd/audita config validate --config examples/production-config.yml
go run ./cmd/audita config print-effective --config examples/minimal-config.yml
```
3. Re-check subprocess/runtime contract when touching CLI/process/report paths:
- `--output` success keeps stdout empty;
- no `--output` success writes transcript JSON to stdout;
- `--report-json` writes file output and is not written to stdout;
- failures return nonzero and include diagnostics path when available.
4. Re-check diagnostics/report/redaction when touching LLM, reporting, or diagnostics code:
- report schema metadata fields remain present;
- diagnostics artifact paths remain valid;
- configured secret values remain redacted in reports/diagnostics/errors.
5. Re-check output schema behavior when touching serialization/schema code:
- default `bare-segments` behavior remains correct unless intentionally changed;
- `audita-v1` behavior remains correct unless intentionally changed;
- unsupported schemas fail validation/resolve paths clearly.
## Commit Discipline
- Keep commits scoped and reviewable.
- Avoid mixing unrelated refactors with behavior changes.
- Use concise plain-English commit messages.

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# Go Project Documentation Policy
# Documentation Policy
**Base Policy Version:** 1.1
**Last Updated**: 2026-09-23
## Purpose
Project documentation must help four audiences:
1. users who need to run the application;
2. administrators/operators who need to configure and operate it;
3. developers who need to understand and change it safely;
4. LLM coding agents that need clear scope, boundaries, and invariants.
Docs should be accurate, concise, task-oriented, and organized by audience. Prefer links to canonical docs over repetition.
This policy assigns each documentation topic to one canonical owner. Its goal is
to keep this application's documentation accurate, concise, discoverable, and resistant
to drift for users, operators, developers, integrators, and LLM coding agents.
## Core Rules
### 1. Keep docs concise
Each document should cover a defined scope and only the essentials for that scope.
Avoid:
- long background explanations;
- repeated reference material;
- implementation detail in user-facing docs;
- aspirational language outside roadmap docs;
- verbose examples where one minimal example is clearer.
### 2. Document only implemented behavior outside roadmap files
Unimplemented, planned, aspirational, experimental, or future work may be described only under:
- `docs/roadmap/`
No other documentation file, including `README.md`, should describe code, features, modules, stages, commands, config fields, or behaviors that do not currently exist.
If a feature is partial, non-roadmap docs may describe only the implemented portion and its current boundary.
### 3. Use canonical homes
Each type of information should have one canonical location.
Canonical homes:
- project purpose and quickstart: `README.md`
- development principles: `docs/policy/architecture.md`
- configuration reference: `docs/config.md`
- CLI reference: `docs/cli.md`
- operations and recovery: `docs/operations.md`
- troubleshooting: `docs/troubleshooting.md`
- implemented internals: `docs/internal/`
- future work: `docs/roadmap/`
- contributor workflow: `docs/policy/development.md`
- copyable examples: `examples/`
Other files should summarize briefly and link to the canonical source.
### 4. Keep examples real
Examples should be valid, maintained, and free of secrets.
Where practical:
- example configs should load successfully;
- example commands should match real CLI syntax;
- important examples should be covered by tests.
## Documentation Profiles
All projects require:
- `README.md`
- `docs/policy/architecture.md`
Additional docs depend on the project.
### Small library
Recommended:
- `docs/policy/development.md`, if contributor conventions are non-obvious
### Simple CLI
Required:
- `docs/cli.md`
Recommended:
- `docs/policy/development.md`
### Config-driven CLI
Required:
- `docs/cli.md`
- `docs/config.md`
Recommended:
- `examples/`
- `docs/policy/development.md`
### Stateful or operator-facing application
Required:
- `docs/cli.md`, if CLI-based
- `docs/config.md`, if config-driven
- `docs/operations.md`
Recommended:
- `docs/troubleshooting.md`
- `examples/`
- `docs/policy/development.md`
### Modular, staged, service-oriented, or orchestration application
Required:
- `docs/cli.md`, if CLI-based
- `docs/config.md`, if config-driven
- `docs/operations.md`
- `docs/internal/`
- `docs/policy/development.md`
Recommended:
- `docs/troubleshooting.md`
- validated examples under `examples/`
## Required Documents
### README.md
**Audience:** users, administrators, operators
The README is the outward-facing project orientation page.
It should include, in order:
1. concise description;
2. elevator pitch;
3. shortest useful command or usage example;
4. links to targeted docs.
The README should be short. It is not a manual.
The “shortest useful command” means the simplest command that performs the project’s core use case. (It does not mean `app --help`.)
### docs/policy/architecture.md
**Audience:** developers, LLM coding agents
`docs/policy/architecture.md` is required for every project.
It is an inward-facing development policy document. It should describe how the project is intended to be built and changed.
It should include:
- project shape;
- core design principles;
- package and boundary philosophy;
- state/persistence philosophy, if applicable;
- external integration philosophy, if applicable;
- error-handling and logging principles;
- testing expectations;
- documentation expectations;
- architectural invariants;
- explicit non-goals, if useful.
For small projects, this file may be brief. It may simply state that the project is intentionally narrow, monolithic, and dependency-light.
### docs/policy/development.md
**Audience:** developers, LLM coding agents
Required for projects maintained by humans and LLM coding agents.
It should include:
- repository layout;
- build/test commands;
- coding conventions;
- dependency policy;
- how to add config fields;
- how to add CLI flags;
- how to add stages/modules/adapters, if applicable;
- how to update examples;
- documentation update expectations.
### docs/config.md
**Audience:** administrators, operators, advanced users
Required for applications with configuration files.
It should include, in order:
1. config file locations and discovery precedence;
2. minimal working config;
3. production-oriented config;
4. full configuration reference;
5. secrets handling, if applicable;
6. links to maintained examples.
The full configuration reference should be canonical.
### docs/cli.md
**Audience:** users, administrators, operators
Required for CLI applications.
It should include, in order:
1. shortest useful command;
2. command overview;
3. complete flag reference;
4. common workflows;
5. diagnostic or recovery commands, if applicable.
Explain when commands are useful, not just their syntax.
### docs/operations.md
**Audience:** administrators, operators
Required for applications that maintain state, support resume behavior, run multiple stages, write durable artifacts, use remote storage, or require recovery procedures.
It should cover:
- normal workflow;
- filesystem layout;
- remote storage layout, if applicable;
- logs and manifests;
- resume/retry behavior;
- cleanup behavior;
- archive/backup behavior;
- safe recovery procedures;
- operational caveats.
### docs/troubleshooting.md
**Audience:** administrators, operators
Recommended once recurring failure modes exist.
Each entry should include:
- symptom;
- likely cause;
- diagnostic command or inspection step;
- safe fix;
- relevant links.
### docs/internal/
**Audience:** developers, LLM coding agents
Required for modular, staged, service-oriented, or orchestration projects.
This directory describes implemented internal components. It is not the roadmap.
Use one file per major component where useful.
Each component doc should include:
1. purpose;
2. inputs and outputs;
3. boundaries;
4. config fields used;
5. external adapters used;
6. state or manifest behavior, if applicable;
7. skip/resume behavior, if applicable;
8. failure behavior;
9. tests to inspect before changing;
10. architectural invariants.
### docs/roadmap/
**Audience:** maintainers, developers, LLM coding agents
This is the only place for planned, future, aspirational, experimental, or unimplemented work.
Roadmap docs should clearly distinguish:
- proposed work;
- accepted plans;
- deferred ideas;
- rejected ideas;
- implementation prompts or task breakdowns, if useful.
Roadmap docs should not be confused with current behavior.
### docs/integrations/
**Audience:** developers, LLM coding agents
Required for projects that depend on external CLIs, APIs, services, protocols, or file formats where the integration contract is important to maintain.
This directory contains concise, versioned reference notes for external integration contracts. It should document only the parts of the external system that this project actually uses.
Use one file per integration where useful.
## Examples Directory
Projects with non-trivial configuration or workflows should include `examples/`.
Useful examples include:
- minimal working config;
- production-oriented config;
- full annotated config;
- local development config;
- remote/object-storage config;
- minimal session/input file.
Examples should be valid, maintained, tested when practical, and linked from relevant docs.
## Security and Privacy
Docs and examples must not include:
- real API keys;
- tokens;
- passwords;
- private keys;
- private environment dumps;
- sensitive user data;
- raw private transcripts;
- private infrastructure details unless intentionally public.
Document secret-handling mechanisms, not actual secret values.
## Maintenance Rules
When docs change, verify the affected behavior.
Where practical:
- load example config files in tests;
- test CLI examples or command parser behavior;
- validate documented flags against real flags;
- remove stale references;
- update links after renames;
- keep roadmap content out of non-roadmap docs.
If documentation and code disagree, fix the documentation and/or open a roadmap item; do not leave aspirational behavior in current-behavior docs.
Documentation is complete only when it matches the current code.
## Documentation Change Checklist
Before merging documentation changes, verify:
- README is concise and orientation-focused.
- `docs/policy/architecture.md` describes development principles.
- Future work appears only under `docs/roadmap/`.
- User-facing docs avoid unnecessary internals.
- Developer-facing docs preserve boundaries and invariants.
- Config examples match the schema.
- CLI examples match real commands and flags.
- Defaults appear in the canonical config reference.
- No secrets or private data are included.
- Links are accurate.
### One Canonical Owner
Each authoritative fact belongs in one document. A non-owning document may give
a short, stable summary for orientation, but it must link to the canonical owner
instead of repeating volatile details.
Volatile details include commands, flags, configuration fields and defaults,
module keys, schemas, file names, paths, status codes, retry behavior, and
runtime guarantees. If readers could reasonably treat a statement as a
contract, maintain it only in the owning document.
### Current And Future Behavior
Outside `docs/roadmap/`, documentation describes implemented behavior only.
Partial features may be described only to their implemented boundary.
ADRs are the narrow exception: an ADR may record an accepted architectural
decision before implementation, but acceptance must not be presented as proof
that the behavior exists. The roadmap owns implementation status and sequencing
until the decision is implemented. Current architecture, user, operator,
integration, and internal documentation are updated when the behavior lands.
### Audience And Detail
Write for the document's stated audience and include only the detail needed for
its owned topic. User and operator docs should not expose implementation detail.
Developer docs should link to user-facing and external contracts rather than
restate them.
### Examples
Complete copyable files belong in `examples/`. Documentation may use the
smallest illustrative snippet needed to explain its owned topic, but should link
to maintained examples instead of embedding a second complete copy.
Examples must be valid, secret-free, and tested where practical. Commands and
configuration used in documentation should match the application.
### Security And Privacy
Documentation and examples must not contain real credentials, private keys,
private environment dumps, sensitive source material, or private infrastructure
details unless intentionally public. Document secret-handling mechanisms, not
secret values.
## Canonical Ownership
| Topic | Canonical owner | Owned content | Content owned elsewhere |
| --- | --- | --- | --- |
| Product orientation and minimal end-to-end quickstart | `README.md` | What this application is, why it is useful, one shortest successful invocation, and links onward. | Complete command reference, configuration reference, operational procedures, implementation detail. |
| Contributor entry point | `docs/development.md` | Task-oriented reading guide, minimal contributor orientation, baseline validation commands, and links to canonical docs. | Package inventory, architecture rules, subsystem behavior, detailed change recipes. |
| Application architecture policy | `docs/policy/architecture.md` | System shape, normative ownership, dependency direction, architectural boundaries, invariants, safety properties, and non-goals. | Concrete package inventory, implementation mechanics, contributor procedures, decision history, future work. |
| Agent policy | `docs/policy/agents.md` | Implementation discipline for coding agents, including proportionality, idiomatic simplicity, code discovery, Git commit restrictions, and rules against inventing requirements, restrictions, guarantees, or repository policy. | Application contracts, architecture, testing policy, and contributor procedures. |
| Documentation policy | `docs/policy/documentation.md` | Documentation ownership, audience boundaries, maintenance rules, and ADR/document lifecycle. | Application architecture or product behavior. |
| Testing policy | `docs/policy/testing.md` | Test philosophy, risk-based sufficiency, test boundaries, doubles, coverage guidance, regression-test policy, and criteria for adding, rewriting, or deleting tests. | Subsystem behavior, application contracts, subsystem-specific test inventories, and implementation plans. |
| Release policy | `docs/policy/release.md` | Versioning and compatibility rules, release integrity and immutability requirements, release-documentation policy, required gates, publication controls, verification requirements, and exception policy. | Repository-specific commands, product installation guidance, CLI version semantics, historical release summaries, and CI implementation detail. |
| Repository-specific release procedure | `docs/release.md` | Maintainer prerequisites, candidate preparation, concrete validation and publication commands, repository and registry guards, deliverable publication, consumer-facing verification, and failure recovery. | General release requirements, product installation guidance, historical release summaries, and current compatibility contracts. |
| CLI contract | `docs/cli.md` | Commands, arguments, flags, invocation semantics, and exit codes. | End-to-end operating procedures, configuration field definitions, runtime filesystem layout, module implementation details. |
| Configuration contract | `docs/config.md` | Discovery and precedence, file schema, fields, defaults, environment overrides, validation rules, and user-selectable module or validator keys. | Complete example files, CLI syntax, runtime state lifecycle, module implementation details. |
| Operations | `docs/operations.md` | Runtime workflows, physical filesystem and state layout, output, cache, and debug handling, cleanup, permissions, recovery, and operational limits. | CLI flag syntax, configuration field definitions, logical output schemas, implementation mechanics. |
| Integration contracts for external components | `docs/integrations/`, including `docs/integrations/output-files.md` for serialized outputs | External file formats and protocols, upstream and downstream contracts, logical output bundle paths and schemas, media types, and compatibility behavior. | Physical runtime placement and lifecycle, internal transformations, CLI syntax, configuration defaults. |
| Inventory of implemented internal packages | `docs/internal/overview.md` | Current packages and components, their implemented responsibilities, and links to focused internal docs. | Normative architecture, contributor reading policy, external contracts. |
| Behavior and architecture of internal packages | Other files under `docs/internal/` | Implementation flow, internal collaborators and state transitions, package-local guarantees and failures, and relevant tests. | Global architecture invariants, configuration definitions and defaults, external schemas, operator procedures. |
| Contributor change recipes | Relevant files under `docs/internal/`, including `docs/internal/cli-config.md`, `docs/internal/modules.md`, and `docs/internal/validators.md` | Concrete editing and validation steps for each component. | Contributor orientation, global policy, and definitions of external contracts. |
| Architectural decision records | `docs/adr/` | Significant decisions, context, alternatives, rationale, consequences, and supersession history. | Current behavior reference, implementation status, task sequencing. |
| Future work and implementation status | `docs/roadmap/` | Proposed, accepted, deferred, or rejected work; implementation status; sequencing; and task breakdowns. | Implemented behavior reference and architectural decision rationale. |
| Release-note history | `docs/releases/` | One checked-in historical summary for each source release made under the procedure. The note at the immutable tag is that release's record. | Current commands, behavior, contracts, and compatibility definitions. |
| Complete copyable artifacts | `examples/` | Maintained configuration, inputs, and other files intended to be copied or run. | Field-by-field reference, command reference, prose explanation. |
Documents that do not exist are required only when the corresponding interface
or responsibility exists. Do not create placeholder API, consumer, integration,
or operations documents for behavior the application does not have. Audita has
retired its standalone troubleshooting guide; concrete operating and recovery
procedures belong in `docs/operations.md`.
## Boundary Rules
### Orientation
The README owns product orientation. The developer guide routes contributors.
Architecture owns normative structure. Internal overview owns the current
concrete component map. These documents may link to one another but should not
maintain parallel package or behavior descriptions.
### Commands, Configuration, And Operations
CLI documentation answers how to invoke the application. Configuration
documentation answers what settings mean. Operations answers what happens to
runtime state and how to operate or recover the application. When a workflow
crosses these topics, choose the document that owns the task and link to the
other contracts.
### Releases
The release policy defines requirements and invariants that every release must
satisfy. The repository-specific release procedure defines the commands and
workflow maintainers use to satisfy that policy. Release notes are immutable
historical summaries, not current-state contract owners: the checked-in note at
an immutable tag records that release, while current canonical documentation
must change with the behavior it describes. Do not use a release procedure or
release note to weaken policy, redefine current behavior, or defer required
documentation updates.
### Contracts And Implementation
Integration and API documents define externally observable shapes and
semantics. Internal documents explain how this application implements or consumes those
contracts. Internal docs may name a field, file, or protocol to identify a
dependency, but must link to its canonical contract for the definition.
### Security Topics
This policy owns what documentation and examples may contain. Architecture owns
application security invariants. Configuration owns credential-supply
mechanisms. Operations owns permissions and handling of sensitive runtime
artifacts. Internal docs own implementation mechanisms only.
## Architecture Decision Records
Use sequentially numbered ADR filenames such as
`0001-record-architecture-decisions.md`. Follow the lightweight Nygard format:
1. title;
2. status;
3. date;
4. context;
5. decision;
6. alternatives considered;
7. consequences.
Treat the decision content of an accepted ADR as immutable. When a decision
changes, create a new ADR and update the earlier ADR's status to superseded.
Rejected architectural alternatives belong in the ADR; rejected product ideas
belong in the roadmap.
## Maintenance
When behavior changes, update its canonical owner in the same change. If
ownership moves, remove the old definition and replace it with a link where
navigation remains useful.
Before completing documentation work:
- verify affected behavior and examples;
- check commands, flags, fields, defaults, schemas, and paths against their
implementation;
- keep unimplemented behavior in the roadmap, subject to the ADR exception;
- remove stale references and validate links;
- confirm that non-owning documents summarize and link rather than redefine;
- confirm that no secrets or sensitive private data were added.

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# Release Policy
**Base Policy Version:** 1.0
**Last Updated**: 2026-09-23
## Purpose
This policy defines the minimum requirements for selecting, validating,
publishing, verifying, and correcting releases. Its goal is to make every
release intentional, reproducible from an exact source revision, documented
for consumers, and safe from retrospective replacement.
The repository-specific commands that implement these requirements belong in
`docs/release.md`. Historical release summaries belong in `docs/releases/`.
This is an Audita-specific adaptation of the base policy, not a requirement to
implement the standard unchanged. Adapt it further when Audita's needs warrant;
the canonical procedure must agree with the adopted policy.
## Release Model
A release identifies one exact source commit with an immutable version tag and
its checked-in release note. The primary release branch is `main`.
Release success means that the intended version tag has been created and
successfully pushed to the authoritative remote with its source commit. The
release procedure ends at that point. It must never wait for CI to complete or
require successful CI status, artifact publication, or consumer installation as
a completion gate.
CI builds and publishes binaries and checksums asynchronously from the tagged
source. Delayed or failed automation does not reverse release success. Artifact
availability is a separate status and must not be claimed merely because the tag
was pushed. Published artifacts must be traceable to the tagged source.
Automation must not silently change the source candidate, move a published tag,
or replace an existing published artifact.
## Supported Platforms
| Platform | Support |
| --- | --- |
| Linux amd64 | Required production target |
| Linux arm64 | Required production target |
| macOS arm64 | Best effort for local development; failures do not block a release or Linux artifact publication |
Windows and macOS amd64 are unsupported. Neither their builds nor tests are
release requirements. Native macOS testing and access to a Mac are not release
prerequisites.
## Versioning And Compatibility
Stable releases use Semantic Versioning in the form `vMAJOR.MINOR.PATCH`, with
no leading zeroes. Each version must be unused locally and on the authoritative
remote before publication begins.
Unless an adopted policy explicitly supports and defines prereleases,
prerelease versions are not permitted.
For releases at or after `v1.0.0`:
- a major release may make intentional incompatible changes;
- a minor release may add backward-compatible behavior; and
- a patch release may make backward-compatible fixes.
Before `v1.0.0`, a minor release may change a documented public, operational,
configuration, data, integration, or compatibility contract when the release
note explains the impact and required consumer action. A patch release must
not intentionally break those contracts within its minor line.
A repository with additional compatibility promises must define them in its
adopted policy or canonical contract documentation. A release note may explain
a compatibility change, but it must not redefine the current compatibility
contract.
## Release Documentation
Every release made under this policy must include
`docs/releases/<version>.md` in the tagged source tree. The filename must use
the complete version tag, and the document must begin with a title containing
the product name and that exact version.
Release notes must contain a short summary and any relevant compatibility or
upgrade instructions. Fixed sections and explicit no-action boilerplate are not
required. Keep notes proportionate to the change.
Release notes are immutable historical summaries. They should link to current
canonical documentation for exact behavior. Every affected canonical document
must be updated in the same candidate; a release note must not substitute for
current documentation or defer required documentation changes.
## Candidate Preparation And Validation
Use the minimum gates needed for confidence in Audita's release. Provide one
local command for the selected automated checks, following the
[testing policy](testing.md). Run the deterministic, offline default test suite
once for the candidate and verify that both required Linux targets build.
Avoid duplicate test runs solely to satisfy separate release phases.
Additional checks must address a concrete risk not already covered. Do not
inherit a mandatory linting, documentation audit, platform matrix, or live-service
checklist solely from the base policy. Documentation migration validation is
separate work, not automatically a recurring release gate.
Automate mechanical guards. Do not require manual approvals, sign-offs, laptop
testing, or post-publication inspection as release gates. Version selection and
a concise release summary remain preparation inputs, not separate approval rounds.
## Publication Guards
The procedure must automate the small set of checks needed to publish the
intended source under a fresh version:
- valid, unused version on the authoritative remote;
- clean worktree and index on the primary release branch;
- the exact candidate that passed the local checks, including its matching note;
- publication of that source commit and the exact intended tag.
Do not require remote CI success. Avoid an additional manual confirmation for
each mechanical guard. Publish explicit refs rather than all local tags.
A successful push is the completion signal; a failed or ambiguous push must be
resolved against remote ref state before declaring success or retrying.
## Immutability And Correction
Published version tags and published deliverables are immutable. Do not move,
overwrite, recreate, or delete a published tag. Do not replace an artifact,
image, package, checksum, signature, provenance statement, or release note
under an already published version.
If validation fails before publication, correct and commit the candidate, then
rerun the release command. Validation must apply to the exact candidate. An
unpublished local tag may be removed after confirming that it was never published
or used by a release channel.
If a defect is discovered after publication, leave the published release intact. Correct the defect on the primary branch, choose a
new patch version or other semantically appropriate new version, write a new
matching release note, and perform the complete release procedure again.
A distribution channel's supported yank, deprecation, or advisory mechanism
may warn consumers away from a defective release, but it must not replace that
release's contents or reuse its version.
## Repository Release Procedure
Maintain [docs/release.md](../release.md) as a short, executable maintainer runbook.
It must identify prerequisites, authoritative remote, version and note preparation,
one local validation command, automated source/tag guards, exact publication
commands, and failure handling. It must name the asynchronous automation and link
to this policy for supported platforms and release-success semantics.
Describe how to diagnose or retry failed artifact delivery separately from release
completion. Missing artifacts may be published later from the same immutable tag;
existing published artifacts must not be overwritten. A source defect requires a
new version. No polling or CI waiting belongs in the release command.
## Audita Adaptations
The maintainer approved these deviations from the base policy on 2026-09-23:
- Audita's needs govern policy adaptation rather than strict template compliance.
- Only Linux amd64 and arm64 are required; macOS arm64 is best effort.
- A successful tag push completes the release; asynchronous CI cannot block it.
- Gates are minimal, automated where practical, and avoid redundant validation
and human intervention.
The [release procedure](../release.md) and its linked scripts implement these
requirements. CI delivery remains asynchronous.

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# Testing Policy
**Base Policy Version:** 1.0
**Last Updated**: 2026-09-23
## Purpose
Our tests exist to make **incorrect changes expensive and correct changes cheap**.
We do not optimize for test count, line coverage, exhaustive isolation, or the fewest possible tests. We optimize for sufficient confidence in important behavior while imposing as little unnecessary friction as possible on future development.
## Every test has a cost
Testing is not an unqualified good. Every test imposes both an immediate cost and a continuing lifetime cost.
A test must be:
- written and reviewed;
- understood by future maintainers and coding agents;
- executed in local and CI workflows;
- diagnosed when it fails;
- updated when legitimate behavior changes;
- maintained as fixtures, APIs, and dependencies evolve; and
- removed or rewritten when it becomes redundant, brittle, misleading, or obsolete.
Tests also create cognitive and architectural friction. They can constrain refactoring, duplicate policy, slow feedback loops, add noise to failures, and cause harmless implementation changes to require unrelated edits across the suite.
A test is warranted only when the confidence it provides justifies these costs.
Apply this cost-benefit analysis at two levels:
1. **Per test:** What realistic defect does this test detect, how consequential would that defect be, and is that protection worth the test's lifetime cost?
2. **Across the suite:** Does this collection provide materially more confidence than a smaller, simpler suite would?
The preferred test suite is a **lean suite that provides sufficient confidence in the risks that matter, without redundant or low-value tests**. We seek sufficient confidence with the least unnecessary testing friction, not the fewest possible tests.
Some friction is intentional. Tests should make dangerous changes—such as breaking compatibility, corrupting data, violating security boundaries, or reintroducing subtle bugs—require deliberate review. They should not make ordinary internal changes needlessly expensive.
The cost of a test is not a reason to omit testing by default. Do not cite maintenance cost abstractly. When omitting a plausible test, be able to state why the protected failure is low-risk, already covered, obvious, reversible, or cheaper to detect elsewhere. For consequential, subtle, or difficult-to-observe behavior, the presumption should favor testing.
## Default testing style
Use a **classical/Detroit-style** approach:
- Test observable behavior, resulting state, contracts, and invariants.
- Use real internal collaborators when they are fast and deterministic.
- Use fakes, stubs, or mocks primarily at expensive, nondeterministic, destructive, or external boundaries.
- Prefer package-level behavioral tests over tests coupled to private helpers or internal call sequences.
- Treat exact collaborator interactions as testable behavior only when the interaction itself is a requirement.
Examples of appropriate seams include clocks, randomness, subprocesses, remote APIs, object storage, email, and paid LLM calls.
## Test execution requirements
Tests in the default suite must be deterministic, offline, and independent of real credentials. They must not invoke paid APIs or depend on mutable external services. Tests that require live infrastructure must be explicitly opt-in and clearly separated from the default suite.
Control clocks, randomness, environment variables, and other process-global or machine-specific state when they affect behavior. Tests should be safe to run repeatedly and alongside other tests without depending on execution order or state left by an earlier test.
## What deserves tests
To the extent the following features are present in the application, prioritize tests for:
1. Public and package-level contracts.
2. Domain rules and important invariants.
3. Boundary conditions and malformed input.
4. Failure handling, cancellation, retries, recovery, and partial success.
5. Serialization, schemas, compatibility, and round trips.
6. Previously observed or plausible regressions.
7. Representative integration and end-to-end workflows.
A package-level contract is behavior relied upon by another package or major collaborator, not every observable detail of a package implementation.
For behavior involving **data integrity, destructive operations, compatibility, security, concurrency, idempotency, or recovery**, presume that durable tests are required unless the behavior is already credibly protected at another layer.
Do not add tests merely because a function, branch, or line exists. Do not add a test when the same meaningful risk is already adequately protected elsewhere.
## Choose the right test boundary
Test through the narrowest stable boundary that expresses the behavior clearly.
This is often the package API, but it may instead be:
- a smaller pure function when dense domain logic is most clearly isolated there;
- a package-level operation when several internal collaborators jointly produce the behavior; or
- a larger integration boundary when correctness emerges from interaction with a real dependency.
Do not force all behavior through oversized end-to-end tests. Do not test every private helper merely because it exists. Choose the boundary that gives durable confidence with the least incidental coupling.
## Test behavior, not implementation
A test should protect a decision, contract, or invariant. A test must not memorialize the current implementation.
Before adding or retaining a test, ask:
> What realistic defect would this test catch?
A test is suspect when its main purpose is to detect that someone:
- changed an internal constant;
- renamed or split a private helper;
- reordered equivalent internal operations;
- changed incidental formatting;
- replaced one correct algorithm with another; or
- refactored internal object structure without changing behavior.
Refactoring should normally require no test edits unless the refactored structure is itself part of the contract.
A test can be factually correct and still have negative value. Accurately describing current behavior is not sufficient; the protected behavior must be important enough to justify the future friction.
## Expected effects of different changes
Use the following expectations when evaluating test failures and test maintenance:
| Change | Expected effect on tests |
|---|---|
| Internal refactor that preserves behavior | Existing tests should normally remain unchanged and continue to pass. |
| Change to an internal default with no contractual significance | Behavioral tests should normally remain unchanged; tests should derive expectations from configuration or relationships rather than duplicate the old value. |
| Intentional change to public behavior, policy, schema, or compatibility guarantees | The relevant tests should be reviewed and changed deliberately. |
| Accidental violation of a contract or invariant | Tests should fail; fix the production code rather than rewriting the tests to accept the defect. |
A test failing is not the same as a test needing to be edited. Many tests may correctly fail because of one production defect. The maintenance smell is a correct internal change that requires unrelated expectation updates throughout the suite.
## Separate mechanism from policy
Configurable thresholds and defaults must not be duplicated throughout the test suite.
For example, do not encode an internal concurrency limit indirectly:
```go
// Production policy:
const maxConcurrency = 4
// Brittle test:
err := startProcesses(5)
require.Error(t, err)
```
Instead, test the mechanism relationally:
```go
const limit = 2
runner := NewRunner(limit)
require.NoError(t, runner.Start(limit))
require.ErrorIs(t, runner.Start(limit+1), ErrTooMuchConcurrency)
```
The test should prove:
- the configured limit is accepted; and
- one beyond the configured limit is rejected.
The production default should be tested exactly only when its literal value is itself a public, operational, safety, protocol, or compatibility requirement.
Apply the same rule to limits, timeouts, capacities, retry counts, and ranges: test relationships and behavior, not duplicated literals.
For concurrency limits, test both kinds of behavior when relevant:
1. **Configuration enforcement:** invalid or excessive requested values are handled correctly.
2. **Runtime enforcement:** observed peak concurrency never exceeds the configured limit.
Use a test-controlled limit and measure the behavior relative to that limit. Do not merely assert today's default value.
## Avoid semantic duplication across layers
Each behavior should have a clear test owner.
- Parser tests own parsing cases.
- Validator tests own validation rules.
- Domain tests own transformations and invariants.
- Adapter tests own external integration behavior.
- Orchestrator tests own coordination and failure propagation.
- CLI tests own argument and configuration mapping.
- End-to-end tests prove that representative assembled workflows work.
Higher-level tests should not repeat every lower-level case. A single intentional policy change should not require unrelated edits across many test files.
Tests that are individually reasonable may still be collectively redundant. Evaluate the marginal value of each additional test in light of the protection already provided by the rest of the suite.
## Use test doubles deliberately
Choose the least elaborate test double that provides the required control or observation.
As a default:
1. Prefer real collaborators when they are fast and deterministic.
2. Use small in-memory fakes when realistic stateful behavior is helpful.
3. Use stubs when a dependency only needs to provide controlled responses.
4. Use mocks when the interaction itself is contractual.
Mocks are appropriate when the contract includes facts such as:
- a notification is sent exactly once;
- a transaction is committed only after successful writes;
- cancellation reaches a subprocess;
- an expensive API is called no more than once; or
- a security audit event is emitted.
Do not use mocks merely to isolate every object or reproduce the implementation's call graph.
## Go-specific guidance
Use:
- table-driven tests for meaningful behavioral categories and boundaries;
- `t.TempDir()` for real filesystem behavior;
- `httptest.Server` for realistic HTTP interactions;
- fuzz tests for parsers, normalization, path handling, and broad input spaces;
- golden files only when the complete output is intentionally stable;
- integration tests where correctness depends on component interaction; and
- a small number of representative end-to-end tests.
Avoid exact error-string assertions unless the wording is itself contractual. Prefer `errors.Is`, `errors.As`, typed errors, or structured error fields.
At CLI boundaries, prefer exit classifications, structured output, and the smallest stable semantic fragment needed to identify the error. Do not snapshot complete diagnostic wording unless it is contractual.
Golden-file updates must require an explicit local flag. CI must not update golden files automatically, and reviewers must inspect the semantic diff before accepting an update.
Keep tests readable and direct. Test helpers and fixture frameworks must earn their own maintenance cost; do not build elaborate test infrastructure for small or isolated needs.
## Coverage
Coverage is a diagnostic, not a target.
Use it to find untested critical branches and unexpectedly weak packages. Do not write low-value tests solely to increase a percentage, and do not infer test quality from coverage alone.
Pure domain logic will often warrant higher coverage than CLI wiring or external adapters. Uneven coverage is acceptable when it reflects risk.
Increasing coverage is valuable only when the newly covered behavior protects a meaningful risk at an acceptable cost.
## Regression tests
A bug fix should normally include a regression test that fails before the fix and passes afterward.
Retain the test when the defect could realistically recur and its consequences justify the ongoing cost. Prefer the narrowest durable test of the violated contract or invariant; do not preserve accidental implementation details from the original bug.
Not every historical bug requires a permanent test. If the underlying design has made recurrence impossible, the test has become redundant, or a stronger invariant test now subsumes it, remove or consolidate it.
## Deleting or rewriting tests
Tests are maintained code, not permanent historical artifacts.
Delete or rewrite a test when its maintenance cost exceeds the confidence it provides.
Strong candidates include tests that:
- require updates after harmless internal changes;
- directly assert private constants without protecting a real contract;
- duplicate the same policy across several layers;
- verify mock choreography rather than outcomes;
- snapshot large amounts of incidental output;
- test trivial private helpers already exercised through stable package behavior;
- protect risks already covered more effectively elsewhere;
- are flaky, misleading, obsolete, or disproportionately expensive to diagnose; or
- no longer correspond to a plausible failure mode.
Several brittle tests may encode one genuine requirement. Replace them with one durable behavior-level or invariant test rather than preserving all of them.
Deleting a low-value test can improve the quality of the suite by reducing noise, maintenance burden, and friction around legitimate change.
## Reviewing a proposed test
Use the following questions when the value, boundary, or durability of a proposed test is not self-evident. Significant test additions should be reviewable against them, but written answers are not required for every routine test.
1. What realistic defect would it catch?
2. How likely is that defect?
3. How consequential would it be?
4. Is the behavior already protected elsewhere?
5. At which layer should this behavior be owned?
6. Does the test assert a durable contract or an incidental implementation detail?
7. Could the implementation be refactored without changing the behavior and without editing this test?
8. What should cause this test to fail?
9. What legitimate changes should not cause this test to fail?
10. What ongoing maintenance, execution, and diagnostic cost will the test impose?
11. Is there a smaller or more direct test that protects the same risk?
Do not add the test when its expected lifetime cost exceeds its expected protective value.
When deciding not to test plausible behavior, record or be able to explain why the risk is low, already protected, obvious, reversible, or cheaper to detect elsewhere.
## Definition of sufficient
A test suite is sufficient when:
- important contracts and invariants are protected;
- meaningful boundaries and failure modes are exercised;
- realistic and consequential regressions are credibly protected against silent recurrence;
- behavior involving data integrity, destructive operations, compatibility, security, concurrency, idempotency, and recovery is credibly protected;
- important external boundaries have realistic integration coverage;
- representative complete workflows are tested;
- failures provide useful signal rather than redundant noise;
- legitimate internal changes usually do not require test edits; and
- additional tests would mostly repeat existing protection or preserve inconsequential implementation details.
Sufficiency is a risk judgment, not a coverage percentage or test count. Reassess it as the application, its users, and the consequences of failure evolve.
The governing rule is:
> Test heavily where failure is consequential, subtle, or difficult to detect after the fact. Test lightly where failure is obvious, reversible, and inexpensive—and retain no test whose lifetime cost exceeds the confidence it provides.