# Requirements: v1.64 L1 Method Specificity Surface

## Milestone Goal

Close the first missing production slice of backlog `999.27` by adding bounded
source-backed method-specificity surfaces to `l1_source_intake`.

## Active Requirements

### Extraction

- [x] `REQ-MSPEC-01`: record `method_specificity_rows` in `l1_source_intake`.
- [x] `REQ-MSPEC-02`: each row exposes method family, specificity tier,
  reading depth, and evidence excerpt.

### Runtime And Acceptance

- [x] `REQ-MSPEC-03`: topic-shell markdown, runtime bundle, and `status --json`
  expose the new surface.
- [x] `REQ-MSPEC-04`: one isolated non-mocked acceptance path proves the new
  surface through a real runtime entrypoint.

### Documentation And Verification

- [x] `REQ-MSPEC-05`: docs and contract tests document the bounded first slice
  honestly.
- [x] `REQ-VERIFY-01`: close with targeted regressions, maintainability-budget
  verification, and a green full knowledge-hub suite.
