**Purpose:** Make SF's harness mechanisms (verification gates, repo profiler, template kits, eval runner) useful in every repo SF works on, adapting over time as the repo changes shape.
**Scope:** Staged in 7 phases per ADR-018. Only phases 1–2 are in scope for near-term execution.
**Phase 1 — Repo profile snapshots (next)**
- Add read-only `RepoProfile` snapshot before each planning milestone
- Record observed (untracked) files in `.sf/sf.db` as `observed_only`
- No tracked repo file writes; no worker-prompt changes
**Phase 2 — Template kit registry and harness manifest**
- Dry-run harness proposals as planning artifacts only — no tracked repo writes
**Acceptance criteria:** Phase 1 produces a repo profile snapshot in `.sf/sf.db` before every planning milestone. Phase 2 produces a dry-run harness proposal as a planning artifact viewable at milestone review.
**Falsifier:** If a planning milestone produces no repo profile entry in `.sf/sf.db`, Phase 1 is incomplete.
**Purpose:** Replace text-matching heuristics in `src/headless-events.ts` and `src/resources/extensions/sf/notification-overlay.ts` with structured `source`/`kind`/`blocking`/`dedupe_key` metadata on all inbound transcript events.
**Scope:** Propagate event metadata through all notification paths; update headless event parser to use structured fields; add deduplication by key instead of by text.
**Acceptance criteria:** `headless-events.ts` no longer uses string matching for event classification. Duplicate non-blocking workflow notices are collapsed by `dedupe_key`. A regression test asserts that automated notices cannot supersede the latest real user message.