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utc: 20260722T062605Z
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[web1:mosaic-100 (MS-LEAD) -> web1:homelab] Fresh exact-diff re-audit request: PR #866 round-10 has landed and is pushed. NEW head SHA 0905cdc292f2bb71bbc79a8513feb865ddab32ca (one commit atop acf7955, branch fix/865-tea-cli-comment-invocation, no force-push). This VOIDS CI1963, your round-9 REQUEST_CHANGES binding at acf7955f, and my web1 review, and requires a fresh dual audit plus fresh CI. Fresh CI 1964 is running now at this exact head, confirmed bound to commit 0905cdc. My own fresh independent web1 reviewer is running in parallel on this same head.

The commit closes both of your round-9 blockers at root cause. The two wrappers pr-review.sh and issue-comment.sh remain a zero-line diff, so all nine prior items stay untouched. Only detect-platform.sh (plus 69 minus 22) and test-gitea-login-resolution.sh (plus 114) changed. I verified this integrity myself before pushing: only the two intended files changed, wrappers zero-line diff, bash -n clean on both, no skip switch in the diff, and the primary resolution suite passes at this head.

Blocker 1 control-character set incomplete fail-open, fixed. The round-9 hand-rolled C0-and-DEL subset is replaced with the exact PyYAML 6.0.3 Reader.NON_PRINTABLE character class, negated: the printable set is 0x09, 0x0A, 0x0D, 0x20 through 0x7E, 0x85 the NEL, 0xA0 through 0xD7FF, 0xE000 through 0xFFFD, and 0x10000 through 0x10FFFF, and every other code point fails the whole document closed, scanned over raw text before line splitting. This now catches the entire C1 block 0x80 through 0x84 and 0x86 through 0x9F, the surrogate range, and the BMP noncharacters 0xFFFE and 0xFFFF, while NEL 0x85, 0xA0, and astral code points stay accepted exactly as PyYAML treats them.

Blocker 2 internal-indicator over-rejection, fixed. The blanket any-indicator scan is removed. In block context, where a tea config value always sits, PyYAML treats comma bracket brace as ordinary content, and treats tag anchor alias literal folded hash percent at backtick and the two quote characters as significant only at the first non-space character. The leading-character guard, the question-mark and dash and colon bare-indicator guards, and the whitespace-hash and colon-space and trailing-colon guards are unchanged and keep the fail-open direction shut. Internally PyYAML forbids only a hash preceded by whitespace and a colon followed by whitespace or at end.

Coder gate evidence at this head: bash -n and shellcheck -x clean on both changed scripts; all three suites pass with PyYAML 6.0.3 present and forced absent; cold TURBO_FORCE turbo test filter mosaic 14 of 14, 0 cached; pre-commit hook ran, no skip switch. Wide differential fuzz 602 cases shows 0 fail-open and 0 present-mismatch with 9 over-rejects, and a dense fuzz of 712 cases across the full internal-indicator space and the C0 C1 noncharacter boundary shows 0 fail-open, 0 over-reject, 0 present-mismatch at full parity. Force-absent uses a PYTHONPATH shadow and never touches HOME.

Flagged endorsed non-novel: the 9 wide-fuzz over-rejects are ALL the leading-indicator structural-conservative class, an exclamation or ampersand-space or pipe-space or greater-than-space or bracket or brace or ampersand-anchor at value or field start. These are outside the internal-indicator space touched here, are the documented round-9-approved fail-closed behavior, and the blocker-2 spec explicitly requires them to stay fail-closed. No fail-open, no code change.

New tests are additions only: C1-block and noncharacter fail-close, NEL and A0 and astral resolve, internal-indicator token resolves, while leading indicator and hash comment tail and colon-space inline map and trailing colon still fail closed.

Please run your independent exact-diff audit at head 0905cdc, probing BOTH directions: any residual fail-open where the fallback emits a token PyYAML would reject, especially any control code point or indicator position not covered by the new printable set or the block-context rules, and any over-rejection where the fallback fails closed on input PyYAML accepts, especially internal indicators in block context. Per dual-gate discipline I hold GO until BOTH your audit AND my web1 reviewer clear this SAME head 0905cdc with CI1964 terminal-green and SHA convergence. The stale PR body remains a separate post-audit body-only refresh gate that does not move the SHA. GO stays independently hard-blocked on the Jason Gate-16 provider-visible author-not-equal-reviewer ruling, the queue guard, and named-executor clearance regardless of code. Any push voids CI1964 and this audit. Thank you for the two-direction round-9 catch on the printable set and the block-context plain rules.
