Fix the five library adoption review findings

docs/roadmap/remediation.md

@@ -4,7 +4,9 @@
 **Scope:** The twelve implementation commits after `1ad2119`, compared with the
 [implementation plan](implementation.md), [combined target](library-adoption.md),
 and [configuration target](configkit.md).
-**Status:** Findings confirmed; fixes have not been implemented.
+**Status:** R1–R5 addressed and verified on 2026-09-24. The evidence in the
+original findings below describes source commit `7cefb3f`; line references are
+historical. See the resolution record at the end for the implemented fixes.
 
 ## Architecture Assessment
 
@@ -190,10 +192,98 @@ wall-clock timing assertions to the default test suite.
 The existing root `go test ./...`, focused race tests for LLM/runner/subprocess
 packages, `go vet ./...`, and Linux amd64/arm64 builds passed. Temporary review
 probes reproduced R1–R4 and measured R5; those probe files were removed afterward.
-The retained suite currently passes despite these defects. Add durable regression
+At review time, the retained suite passed despite these defects. Add durable regression
 coverage with the fixes, using the narrowest useful production boundaries.
 
-Only this remediation document is changed by the review. No application fixes,
+The initial review changed only this remediation document. No application fixes,
 upstream changes, live provider calls, release publication, or compatibility work
 were performed. Release-distribution compliance remains the explicitly deferred
 release task and is not counted as an implementation defect here.
+
+## Resolution Record
+
+All five findings are resolved without compatibility layers, new scheduling,
+or changes to library ownership.
+
+### R1 and R2 — Shared Serialization Boundary
+
+`core/redaction` now sanitizes decoded JSON strings and YAML string nodes,
+retaining numeric/boolean types and avoiding mutation of domain objects.
+Longest matching credentials take precedence in a single replacement pass;
+JSON-escaped credential forms are handled for embedded response content.
+Serialization or key-collision failures return no payload. The unredacted report
+fallback has been removed.
+
+The CLI supplies all resolved backend credentials to the external report writer
+and run directory. Report copies, ledgers, execution/utilization artifacts,
+interaction diagnostics, selected profiles, and error text share the redactor.
+ConfigKit still owns credential-reference redaction of effective configuration.
+
+Evidence:
+
+- `TestSubprocessRedactsValidModelReasonsOnSuccessAndPartialFailure` exercises
+  schema-valid negative assessments containing selected and unselected secrets,
+  including quotes/backslashes. Both reports and retained artifacts are checked;
+  partial failure preserves earlier decisions and writes no corrected output.
+- `TestReportWritersRedactStringsAndFailClosed` exercises both actual report
+  writers with credential `2`, preserving numeric configuration version 2 while
+  redacting string content, and verifies failed serialization writes no artifact.
+- `TestStringRedactionPreservesSerializationAndDomainData` covers overlapping
+  secrets, escaped nested content, large numbers, booleans, YAML scalar types,
+  unchanged domain data, and failures without an original-payload fallback.
+
+### R3 — Immediate Shared Cancellation
+
+Validation workers record their error and cancel shared work immediately.
+All accesses to the originating-error state use a mutex. Proposal collection
+stops launching validation after a recorded failure; active workers are joined
+and available results retain deterministic collection order.
+
+`TestValidatorFailureCancelsActiveAndPendingProviderWork` uses the real PromptKit
+runtime with backend concurrency one and queue capacity one. A failing validator
+cancels two peer executions, one active in a controlled transport and one pending,
+without manually releasing either. The originating error survives, only one
+provider attempt occurs, and both logical calls retain finished observations.
+The runner and runtime pass the race detector.
+
+### R4 — Independent Module and Section Identity
+
+Validation requests carry the configured module instance and an explicit section
+index. The structured call forwards both; only interaction filenames combine
+module, section, validator, and batch into a diagnostic name. The runner test
+helper now uses section index rather than batch index to identify sections.
+
+`TestSubprocessRepeatedModulesKeepSectionAttribution` runs two grammar instances
+across two sections through the actual CLI/runtime. It verifies exactly two
+utilization entries with two proposal and two validation calls each, explicit
+section/batch identity, four distinct validation response artifacts, and unchanged
+proposal ordering in rejected decisions.
+
+### R5 — Indexed Report Aggregation
+
+Execution mapping indexes events by call ID once. Utilization directly groups
+calls/events by backend and indexes modules by real instance, seeded in module
+result order. Neither builder scans all events for each logical call.
+
+Existing summary tests and `TestIndexedReportsPreserveOrderAndPartialUsage`
+verify pre-dispatch failures, original call/event order, backend grouping, and
+known-but-incomplete usage. `BenchmarkExecutionReports` retains a reproducible
+1,000/10,000/20,000-call benchmark without timing assertions.
+
+A local three-iteration sample measured 20,000 calls at approximately **43 ms**
+for execution mapping and **84 ms** for utilization, compared with the review
+probe's 8.08 s and 2.42 s respectively. Timings are illustrative; the direct
+indexes establish removal of the quadratic scans independently of machine load.
+
+### Completion Validation
+
+- Full offline suite: `go test ./...`.
+- Race checks: runner, LLM runtime, process reporting, redaction, and CLI subprocess
+  packages.
+- Static analysis: `go vet ./...`.
+- Both required Linux architectures: `scripts/build-release.sh` in a temporary
+  output directory, without tagging or publishing.
+- Documentation/diff whitespace checks.
+
+Release publication and deferred release-distribution work remain outside this
+remediation unit.