Document runtime provider parameters

docs/cli.md

@@ -33,6 +33,7 @@ Integration references:
 - `serve` requires an effective `prompt_dir` and `profile_dir` (from flags or config).
 - Positional arguments are rejected.
 - Prompt cache control is configured in prompt YAML (`messages[].cache_control`), not with CLI flags.
+- Provider-specific `reasoning_effort` and `extra_params` are configured in profile YAML or HTTP model overrides, not with CLI flags.
 
 ## Flag Reference
 
@@ -57,6 +58,11 @@ Integration references:
 - `--top-p <float>`: runtime top-p override.
 - `--timeout <duration>`: runtime timeout override (Go duration syntax, for example `30s`, `2m`).
 
+Numeric runtime override flags are presence-aware:
+
+- omitted numeric flags preserve the selected profile/default value
+- explicit zero values override the selected profile/default value (`--temperature 0`, `--max-tokens 0`, `--top-p 0`, `--timeout 0s`)
+
 ### `scriptorium render`
 
 - Supports the same flags as `run`, except:

docs/config.md

@@ -189,6 +189,11 @@ top_p: 1.0
 timeout_seconds: 90
 api_key_env: SCRIPTORIUM_API_KEY
 service_tier: priority
+reasoning_effort: medium
+extra_params:
+  provider_route: primary
+  provider_options:
+    retry_budget: 2
 ```
 
 Field reference:
@@ -201,9 +206,9 @@ Field reference:
 - `top_p` (optional): range `0..1`
 - `timeout_seconds` (optional): `>= 0`
 - `service_tier` (optional): provider-specific request tier such as OpenRouter `flex` or `priority`
-- `reasoning_effort` (optional)
+- `reasoning_effort` (optional): serialized as top-level `reasoning_effort` in outbound chat-completions requests
 - `api_key_env` (optional)
-- `extra_params` (optional map of strings)
+- `extra_params` (optional map): JSON-compatible provider-specific parameters. Values may be strings, numbers, booleans, objects, or arrays.
 
 Profile rules:
 
@@ -211,13 +216,14 @@ Profile rules:
 - Raw `api_key` is rejected; use `api_key_env`.
 - If `api_key_env` is set, that environment variable must be set when preparing/running.
 - Duplicate profile IDs are invalid. If multiple files declare the requested profile ID, Scriptorium fails instead of choosing one.
+- `extra_params` keys must not be empty and must not collide with reserved outbound request fields: `model`, `session_id`, `messages`, `temperature`, `max_tokens`, `top_p`, `service_tier`, `reasoning_effort`, or `response_format`.
 
 Current outbound request behavior:
 
-- The OpenAI-compatible client currently serializes: `model`, optional `session_id`, `messages`, `temperature`, `max_tokens`, `top_p`, `service_tier`, and optional `response_format` for `json_schema` prompts.
+- The OpenAI-compatible client currently serializes: `model`, optional `session_id`, `messages`, `temperature`, `max_tokens`, `top_p`, `service_tier`, `reasoning_effort`, optional `response_format` for `json_schema` prompts, and `extra_params`.
+- `extra_params` are flattened into provider-specific top-level JSON request fields. They are not wrapped in an `extra_params` object on the outbound provider request.
 - Messages without `cache_control` serialize with string `content`.
 - Messages with `cache_control` serialize as a single text content-block array containing `cache_control`.
-- `reasoning_effort` and `extra_params` are parsed and carried in effective settings, but are not currently serialized into outbound chat-completions requests.
 
 ## Schema Behavior
 

docs/integrations/http-api.md

@@ -50,7 +50,10 @@ Copyable request example file:
     "reasoning_effort": "medium",
     "api_key_env": "SCRIPTORIUM_API_KEY",
     "extra_params": {
-      "route": "primary"
+      "route": "primary",
+      "provider_options": {
+        "retry_budget": 2
+      }
     }
   },
   "include_raw_output": false
@@ -67,6 +70,14 @@ Input reference types currently supported by runtime artifact loading:
 - `file`
 - `inline`
 
+Model override notes:
+
+- Numeric model override fields distinguish omitted values from explicit zero values. For example, omitting `temperature` preserves the selected profile/default value, while `"temperature": 0` explicitly sets the effective temperature to zero.
+- `extra_params` accepts JSON-compatible values: strings, numbers, booleans, objects, and arrays.
+- `extra_params` are passed through effective model metadata and flattened into top-level provider request fields by the OpenAI-compatible client.
+- `extra_params` keys must not be empty and must not collide with reserved outbound fields: `model`, `session_id`, `messages`, `temperature`, `max_tokens`, `top_p`, `service_tier`, `reasoning_effort`, or `response_format`.
+- Raw API-key values are not accepted. Use `api_key_env` to name an environment variable.
+
 ## Strict JSON Rules
 
 Request decoding uses strict JSON field checks:
@@ -119,7 +130,10 @@ Response shape:
       "reasoning_effort": "medium",
       "api_key_env": "SCRIPTORIUM_API_KEY",
       "extra_params": {
-        "route": "primary"
+        "route": "primary",
+        "provider_options": {
+          "retry_budget": 2
+        }
       }
     },
     "input_hashes": {

docs/integrations/openai-compatible-chat.md

@@ -32,10 +32,48 @@ Serialized JSON fields:
 - `max_tokens` (only when non-zero)
 - `top_p` (only when non-zero)
 - `service_tier` (only when non-empty)
+- `reasoning_effort` (only when non-empty)
 - `response_format` (only when structured output is provided)
+- profile/request `extra_params` as additional provider-specific top-level fields
 
 `service_tier` is provider-specific. OpenRouter currently documents request values such as `flex` and `priority`; Scriptorium forwards any non-empty configured value and lets the backend validate support.
 
+`reasoning_effort` is provider-specific. Scriptorium forwards any non-empty configured value as top-level `reasoning_effort` and lets the backend validate support.
+
+`extra_params` are flattened into the outbound JSON object. They are not wrapped in an `extra_params` object:
+
+```json
+{
+  "model": "gpt-4o-mini",
+  "messages": [
+    {
+      "role": "user",
+      "content": "rendered text"
+    }
+  ],
+  "provider_route": "primary",
+  "provider_options": {
+    "retry_budget": 2
+  }
+}
+```
+
+`extra_params` values must be JSON-compatible. Supported value shapes include strings, numbers, booleans, objects, and arrays.
+
+Reserved `extra_params` keys are rejected before the HTTP request is made:
+
+- `model`
+- `session_id`
+- `messages`
+- `temperature`
+- `max_tokens`
+- `top_p`
+- `service_tier`
+- `reasoning_effort`
+- `response_format`
+
+Empty `extra_params` keys and values that cannot be encoded as JSON are also rejected before the HTTP request is made.
+
 `session_id` is rendered from prompt YAML using request variables and serialized as a top-level JSON request field. Scriptorium does not send an `x-session-id` header. Empty rendered session IDs are omitted, and values longer than 256 characters are rejected before the HTTP request.
 
 Messages without prompt cache control serialize with string `content`:
@@ -138,12 +176,7 @@ Malformed responses return `ErrMalformedResponse`.
 
 ## Unsupported Or Non-Serialized Fields
 
-The following fields may exist in profile/effective settings but are not currently serialized into outbound chat-completions payloads:
-
-- `reasoning_effort`
-- `extra_params`
-
-The client also does not serialize top-level `cache_control`.
+The client does not serialize top-level `cache_control`.
 
 No built-in retries, tool-calls, or multi-request payload modes are implemented in this client.
 

docs/internal/adapters.md

@@ -69,6 +69,8 @@ Primary app settings consumed by adapters:
 Execution profile/request settings used through runner:
 
 - `endpoint`, `model`, `temperature`, `max_tokens`, `top_p`, `timeout_seconds`, `service_tier`, `api_key_env`, `reasoning_effort`, `extra_params`
+- CLI and HTTP request adapters preserve caller intent for numeric runtime overrides. Omitted values remain absent; explicit zero values are mapped as explicit overrides.
+- HTTP `extra_params` accepts JSON-compatible values and maps them to domain request overrides without provider-specific adapter logic.
 
 ## External Dependencies
 
@@ -97,6 +99,10 @@ LLM adapter:
 - endpoint appends `/chat/completions`.
 - rendered messages without cache control serialize with string `content`.
 - rendered messages with cache control serialize as one text content block with `cache_control`.
+- non-empty `reasoning_effort` serializes as a top-level provider request field.
+- `extra_params` flatten into provider-specific top-level JSON request fields.
+- reserved `extra_params` keys are rejected before the provider call: `model`, `session_id`, `messages`, `temperature`, `max_tokens`, `top_p`, `service_tier`, `reasoning_effort`, and `response_format`.
+- empty `extra_params` keys and values that cannot be JSON-encoded are rejected before the provider call.
 - compatible cache usage response fields are parsed into domain token usage.
 - non-2xx responses map to request failure errors.
 - malformed responses (including missing/empty first choice content) are errors.
@@ -146,5 +152,5 @@ Behavior highlights:
 - Adapter packages do not own runner decision logic.
 - External request/response strictness is part of contract stability.
 - Prepared-render output never includes resolved API key values.
-- Outbound OpenAI-compatible request includes only currently serialized fields (`model`, optional `session_id`, `messages`, optional `temperature`, `max_tokens`, `top_p`, optional `service_tier`, optional `response_format`).
+- Outbound OpenAI-compatible request includes currently serialized first-class fields (`model`, optional `session_id`, `messages`, optional `temperature`, `max_tokens`, `top_p`, optional `service_tier`, optional `reasoning_effort`, optional `response_format`) plus validated `extra_params` flattened as provider-specific top-level fields.
 - Outbound cache control is message-level only; no top-level cache-control field is serialized.

docs/internal/runner.md

@@ -103,6 +103,7 @@ Validation content failures are not run errors:
    - built-in execution defaults
    - selected profile values
    - request overrides
+   - request numeric overrides are presence-aware, so omitted values preserve the current effective value and explicit zero values override it
 6. verify required `api_key_env` environment variable:
    - missing/empty env value returns an invalid request with `ErrAPIKeyEnvMissing`
    - only the environment-variable name is retained; secret value is never returned
@@ -115,6 +116,14 @@ Validation content failures are not run errors:
 
 `Prepare` does not call the LLM.
 
+Runtime target notes:
+
+- Profile `extra_params` and request `extra_params` carry JSON-compatible values through prepared output, run metadata, and `domain.GenerateRequest.Target`.
+- The OpenAI-compatible client serializes non-empty `reasoning_effort` as a top-level provider request field.
+- The OpenAI-compatible client flattens `extra_params` into provider-specific top-level JSON request fields.
+- Empty `extra_params` keys, reserved outbound field names, and values that cannot be JSON-encoded fail before the provider request.
+- Resolved API-key values are never stored in `PreparedRun`, `RunResult`, logs, or HTTP responses.
+
 ## Run Flow
 
 `Run` performs: