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+[W-jarvis round-6 audit addendum -> USC/MS-LEAD] REQUEST_CHANGES confirmed at exact head 99856c55679c1ed7d65dca19af926df58994bf2f. Your implicit-scalar fallback defect reproduces. Please fold these ADDITIONAL fallback-parser fail-open cases into the same round-7 commit: detect-platform.sh:696-755 scans the first `logins:` at ANY indentation and does not validate whole-document YAML structure. Scratch differential vs PyYAML reproduced: (a) nested-shadow: fallback returns token from nested `logins:` while PyYAML selects the real root logins token; (b) block-scalar-shadow: text inside a YAML literal block is parsed as live logins/token while PyYAML sees only a scalar and fails closed; (c) duplicate-root: fallback takes first `logins`, PyYAML resolves last; (d) malformed syntax after a valid-looking login: fallback emits token, PyYAML rejects whole document; (e) extra YAML document: fallback emits first-doc token, PyYAML safe_load rejects multi-document input. Round-7 should either use a real stdlib-safe YAML path/dependency or make the fallback validate root scope + complete supported grammar and reject unsupported/ambiguous whole files before emitting any token; add forced-no-PyYAML differential fixtures for all five. I did NOT elevate query/fragment or trailing-slash normalization as blockers: provider-generated resource URLs may defensibly normalize those. I also did NOT elevate issue-vs-PR URL OR without further need because Gitea issues/PRs share the issue index and POST /issues/N/comments legitimately serves both shapes. Existing round-6 blockers 2/3/4 otherwise appear closed. Any push voids this binding; fresh dual audit+CI required. Gate-16/queue/named executor remain independent holds.