diff --git a/AGENTS.md b/AGENTS.md
index 41667fac..3baa5d03 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -269,6 +269,8 @@ fail-closed and only pauses when the agent actually proposed a reviewed output.
 │           ├── github-app-token/ # GitHub App token minter (bundled to github-app-token.js; mints installation token in Agent + Detection when engine.github-app-token is set)
 │           ├── executor-e2e/ # Stage 3 safe-output E2E test harness (not a bundle; runs deterministic scenarios against a real ADO project and files a GitHub issue on failure)
 │           ├── prepare-pr-base/ # create-pull-request base-ref preparer (bundled to prepare-pr-base.js; fetches/deepens target branch so mcp.rs finds a diff base on shallow-default pools — issue #1413; emitted in BOTH the Agent job and the SafeOutputs job before the executor's worktree add — issue #1453)
+│           ├── trigger-e2e/ # Trigger/filter E2E test harness: gate-spec.ts defines FACT_META (the TypeScript mirror of the Rust Fact registry); fact-catalog.gen.json is the committed drift-guard artifact generated by `cargo run -- export-fact-catalog`; gate-spec.test.ts deep-compares FACT_META against that artifact in CI
+│           ├── __tests__/   # Top-level ado-script unit tests (bundle-coverage.test.ts)
 │           └── shared/   # Shared modules across bundles (auth, ado-client, env-facts, types.gen.ts)
 ├── tests/                # Integration tests and fixtures
 ├── docs/                 # Per-concept reference documentation (see index below)