fix(#1296): align config docs/prompts/schema with consumers (#1299)

* fix(#1296): align config docs/prompts/schema with consumers

The user-facing config surface disagreed with what the consumers actually do
(subset of the #1216 audit). No runtime consumption behavior changes.

- workflow.subagent_timeout: settings-advanced.md prompt + docs/CONFIGURATION.md
  said "seconds (default 600)" but the consumer (map-codebase.md) uses
  milliseconds (default 300000). Relabeled all four spots in settings-advanced.md
  (prompt, parse-default list, example, confirmation table) + the CONFIGURATION.md
  row.
- review.models.<cli>: settings-integrations.md, docs/CONFIGURATION.md (Integration
  Settings), and docs/CLI-TOOLS.md documented a shell command, but review.md injects
  the value into a --model/-m flag. Relabeled to a bare model id and reconciled the
  contradictory CONFIGURATION.md sections.
- workflow.test_command + workflow.build_command: consumed via config-get
  (test_command in verify-phase/execute-phase/audit-fix/post-merge-gate;
  build_command in post-merge-gate) and documented, but absent from validKeys so
  `config set` rejected them. Registered both in config-schema.manifest.json and
  documented them in references/planning-config.md (overview + complete reference).

Regression tests: behavioral config-set tests (tests/config.test.cjs) + doc-parity
content guards (tests/config-field-docs.test.cjs).

Deferred to other #1216 clusters: security-gate wiring, search_gitignored wiring,
mvp_mode, source_grounding_authority labeling, and config-set enum enforcement.

Closes #1296
Refs #1216

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* chore(changeset): Fixed fragment for #1296 config-surface alignment

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

gsd-core/references/planning-config.md

@@ -36,6 +36,8 @@ Configuration options for `.planning/` directory behavior.
 | `git.quick_branch_template` | `null` | Optional branch template for quick-task runs |
 | `workflow.use_worktrees` | `true` | Whether executor agents run in isolated git worktrees. Set to `false` to disable worktrees — agents execute sequentially on the main working tree instead. Recommended for solo developers or when worktree merges cause issues. Note: if your branch is ahead of `origin/HEAD` (a diverged milestone or feature branch), GSD auto-degrades to sequential and prints a warning; set `worktree.baseRef:"head"` in `.claude/settings.local.json` to restore parallel execution. See the branch-divergence note below. |
 | `workflow.subagent_timeout` | `300000` | Timeout in milliseconds for parallel subagent tasks (e.g. codebase mapping). Increase for large codebases or slower models. Default: 300000 (5 minutes). |
+| `workflow.test_command` | `null` | Custom shell command run as the regression/test gate by verify-phase, execute-phase, audit-fix, and post-merge-gate. When unset, GSD auto-detects (Makefile / package.json / Cargo.toml / go.mod / pyproject.toml). Example: `npm test`. |
+| `workflow.build_command` | `null` | Custom shell command run as the build gate by the post-merge gate. When unset, the build step is skipped/auto-detected. Example: `npm run build`. |
 | `workflow.inline_plan_threshold` | `2` | Plans with this many tasks or fewer execute inline (Pattern C) instead of spawning a subagent. Avoids ~14K token spawn overhead for small plans. Set to `0` to always spawn subagents. |
 | `manager.flags.discuss` | `""` | Flags passed to `/gsd:discuss-phase` when dispatched from manager (e.g. `"--auto --analyze"`) |
 | `manager.flags.plan` | `""` | Flags passed to plan workflow when dispatched from manager |
@@ -262,6 +264,8 @@ Set via `workflow.*` namespace in config.json (e.g., `"workflow": { "research":
 | `workflow.skip_discuss` | boolean | `false` | `true`, `false` | Skip discuss phase entirely |
 | `workflow.use_worktrees` | boolean | `true` | `true`, `false` | Run executor agents in isolated git worktrees |
 | `workflow.subagent_timeout` | number | `300000` | Any positive integer (ms) | Timeout for parallel subagent tasks (default: 5 minutes) |
+| `workflow.test_command` | string\|null | `null` | Any shell command | Regression/test gate command run by verify-phase, execute-phase, audit-fix, and post-merge-gate. Unset → GSD auto-detects (Makefile / package.json / Cargo.toml / go.mod / pyproject.toml). |
+| `workflow.build_command` | string\|null | `null` | Any shell command | Build gate command run by the post-merge gate. Unset → build step auto-detected/skipped. |
 | `workflow.inline_plan_threshold` | number | `2` | `0`–`10` | Plans with ≤N tasks execute inline instead of spawning a subagent |
 | `workflow.code_review` | boolean | `true` | `true`, `false` | Enable built-in code review step in the ship workflow |
 | `workflow.code_review_depth` | string | `"standard"` | `"light"`, `"standard"`, `"deep"` | Depth level for code review analysis in the ship workflow |