fix(3347): clear CI gates raised by initial commit

- docs/CONFIGURATION.md: document graphify.auto_update key (config-schema-docs-parity)
- hooks/gsd-check-update-worker.js: add gsd-graphify-update.sh to MANAGED_HOOKS (managed-hooks)
- agents/gsd-planner.md + gsd-phase-researcher.md: slim auto-update awareness block to
  a one-line @-reference; extract full instructions to a new reference file
- get-shit-done/references/planner-graphify-auto-update.md: new reference with the
  status-file schema, the four annotation cases (running/failed/ok-current/ok-stale),
  and interaction with the existing stale-mtime annotation
- docs/INVENTORY.md: References (60 → 61 shipped) + row for new reference; regenerate
  docs/INVENTORY-MANIFEST.json via gen-inventory-manifest.cjs

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/CONFIGURATION.md

@@ -464,6 +464,7 @@ Toggle optional capabilities via the `features.*` config namespace. Feature flag
 |---------|------|---------|-------------|
 | `graphify.enabled` | boolean | `false` | Enable the project knowledge graph. When `true`, `/gsd-graphify` builds and queries a graph in `.planning/graphs/`. Added in v1.36 |
 | `graphify.build_timeout` | number (seconds) | `300` | Maximum seconds allowed for a `/gsd-graphify build` run before it aborts. Added in v1.36 |
+| `graphify.auto_update` | boolean | `false` | **Opt-in (issue #3347).** When `true` (and `graphify.enabled` is also `true`), the bundled PostToolUse hook `hooks/gsd-graphify-update.sh` auto-rebuilds the project knowledge graph in a detached background process after `git commit/merge/pull/rebase --continue/cherry-pick` on the default branch (`git.base_branch` override, else `main`/`master`/`trunk`). Hook returns instantly; the rebuild updates `.planning/graphs/{graph.json,graph.html,GRAPH_REPORT.md}` and writes `.planning/graphs/.last-build-status.json` (`{ts, status: "running"\|"ok"\|"failed", exit_code, duration_ms, head_at_build}`). PID-locked, CI-aware (`$CI` env suppresses), bails silently if `graphify` is not on `PATH`. Default `false` so existing behaviour is unchanged after upgrade. |
 
 #### Multi-developer setup