# Flow Legacy Cross Reference

> Retrofit sub-skill for the flow-architecture plugin (implements CDR-023). NEVER invoked from greenfield. Satisfies Q9's additive-only "cross-reference annotations" lock by appending an HTML-comment-bracketed FDA migration section to every legacy Linear milestone description, mapping it to one or more FDA domains. Three-tier mapping cascade (flow-ID histogram - title-fuzzy - LLM semantic), marker-based idempotency, two-pass execution (generate review doc - user edits + bumps lastreviewed - re-invoke executes). Reusable from both /flow:retrofit-project (Phase 3 annotation) and /flow:deprecate-legacy (Phase 5 disposition mapping). End-to-end wall for M=27 legacy milestones: ~14s Tier 1 batched-body reads (Tier-1 budget assumes Linear MCP's listissues({milestone}) filter is reliable — see Section 1 caveat) + ~5-15s Tier 3 LLM fall-throughs (when 5-10 milestones don't hit Tier 2) + ~40.5s Pass 2 writes (3 calls/milestone) ≈ ~60-70s when filter behaves; significantly more if the milestone-filter gotcha forces a per-child getissue fallback.

## Facts
- Page: https://tashan.sh/capability/skill-brite-nites-flow-legacy-cross-reference
- tashan id: skill:Brite-Nites/flow-legacy-cross-reference
- Source: https://github.com/Brite-Nites/brite-claude-plugins
- Type: skill
- Category: other
- tashan score: not scored (catalogued only — too little public evidence)
- Adoption: 9.0
- Upkeep: 95.0
- Freshness: 90.0
- Evidence coverage: 84% of the inputs this score can use
- Health: active
- Instruction depth: not yet graded
- Official: no

## Install

```sh
cp -r flow-legacy-cross-reference ~/.claude/skills/
```

## Security audit
Not scanned. We audit npm-published capabilities; this one has no npm package we can resolve, or has not reached the queue. This is not a clean bill of health.

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Measured 2026-09-12 by tashan (https://tashan.sh) from public evidence. Scorer s5.