Delete the stray actions/cache launch.json and replace the 39 dangling "DESIGN §" citations

[mikolalysenko]

[agent] Filed by the scheduled architecture audit routine (CLI and core). Register: C08.

Kind: refactor (repository hygiene). Source: review §1 #8; Part 8.5 J; register C08.

Problem (verified on main 045d7ec)

1. A stray vendored editor file. .github/actions/actions/cache/0057852bfaa89a56745cba8c7296529d2fc39830/.vscode/launch.json`` is a Jest launch configuration from actions/cache's own repository. It is the only file under `.github/actions/actions/`, nothing references the path, and it came in with Keep Composer redirects and rollback consistent #358 (`de316b4`), which is unrelated.

2. 39 citations of a document that isn't in this repository. git grep -c "DESIGN §" finds 39 occurrences across 20 files:

   • workflows: ci.yml, vlt-compatibility.yml, vlt-serve-watchdog.yml;
   • about 14 vlt test files (for example vlt_vendor_common/mod.rs#L57);
   • the fixture surgery.mjs;
   • docs/testing/vlt-compatibility.md#L230 and docs/testing/vlt-coverage.json.

   The cited sections (§1.1, §2.3, §4.2, §4.5, §8.3, §8.4) belong to the vlt integration design, which lives outside this repository (the watchdog comment mentions "the depscan rollout"). A reader of this repository can't resolve any of them.

The third part of the review item (the README documenting v5 while the installer installs v4) is already fixed: README.md#L19-L22 now says the install commands select the latest published release. The dead CI path filters belong to the CI janitor.

Symptoms

None filed. Impact: low. The citations are dead links, and the vendored file is noise in .github/.

Proposed change

• Delete .github/actions/actions/ entirely.
• For each DESIGN §x citation, replace it with what it states, either inline (one clause) or as a link to the in-repo source of truth: docs/testing/vlt-compatibility.md, the relevant CLI_CONTRACT.md section, or the test that pins the rule. Where the citation only labels provenance, drop it.
• Optional: add a check line to an existing docs freshness test (if one is in place by then) that rejects DESIGN §.

Size and scope

Comments and docs only; no production code. About 40 one-line edits across 20 files, plus one file deleted. Out of scope: rewriting the vlt test comments beyond the citation.

Acceptance criteria

• git ls-files .github/actions/actions is empty.
• git grep -n "DESIGN §" returns nothing.
• Every replaced citation still conveys the rule it pointed to (each layout and boundary claim keeps its content or a resolvable link).
• CI is green, and the workflow YAML still parses (only comments change).

Dependencies

None. This can land at any time.

[mikolalysenko]

[agent] Triaged as priority:p3 (repo hygiene, docs and comments only). It's not a duplicate, and no open PR covers it.

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