fix: the findings of the release review of 6.3.0

The review of v6.2.0..f669b87 (BLOCK: 1 BLOCKER, 12 MAJOR, 1 MINOR), each
fixed behind a test that failed first, or, for the two missing tests, a test
shown to fail on a stub of the branch it covers.

- Review steps appended by /trekexecute Phase 7.2 are held to the step rules
  on any plan version: plan-validator --steps-from <N> (on a plan below 1.8 a
  template review step validated and was executed).
- The guard refuses where no one can be asked also when its rules will not
  load; the wave merge path names that refusal instead of MERGE_REFUSED.
  Tests for the classifier-error refusal and post-approval-log's own check.
- release-check: the version files may change only in their version after
  the review (JSON compared without it), README diff lines are read inside
  hunks only, an unreadable diff is exit 2, and npm test runs without
  NODE_TEST_CONTEXT.
- What counts as a step of only tests: a note in parentheses is not a path,
  and a data file under specs/ is not a test. End-to-end: rides on the last
  step that builds behaviour (validator hint, trekplan, template).
- A removed line is cited as <rev>:<path>:<line> (findings-schema hint,
  trekreview re-ask).
- skill-lint counts a trailing newline as no line; regression-check takes
  commandEnv from lib/util/command-env.mjs; CLAUDE.md names four mode-read
  exemptions.
- /security-review, older than v6.2.0: the criteria runner refuses git
  --output, which writes a file.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/verification/criteria-runner.mjs

@@ -315,10 +315,13 @@ const RUNNERS = {
   bash: (t) => (isTestScript(t[1]) ? permit() : deny('bash, but not a script under tests/')),
   // The system bash by its path (macOS: 3.2), so a check can pin the shell.
   '/bin/bash': (t) => (isTestScript(t[1]) ? permit() : deny('/bin/bash, but not a script under tests/')),
-  git: (t) =>
-    READONLY_GIT.has(t[1])
-      ? permit()
-      : deny(`git, but not a read-only subcommand first (${[...READONLY_GIT].join('|')})`),
+  git: (t) => {
+    if (!READONLY_GIT.has(t[1])) return deny(`git, but not a read-only subcommand first (${[...READONLY_GIT].join('|')})`);
+    // `--output` makes diff/log/show write their output to a file (release
+    // review of 6.3.0, 2026-10-10: a plan's check could overwrite any file).
+    if (t.some((w) => w === '--output' || w.startsWith('--output='))) return deny('git with --output writes a file, so it is not a read-only check');
+    return permit();
+  },
 };
 
 /**

lib/verification/regression-check.mjs

@@ -24,23 +24,23 @@
 // progress.json uses (C15). Nothing else is translated.
 //
 // The command runs the way the runner runs it (`/bin/sh -c`), but without
-// NODE_TEST_CONTEXT in its environment (red-proof.mjs `commandEnv`): measured
+// NODE_TEST_CONTEXT in its environment (lib/util/command-env.mjs): measured
 // 2026-10-08, a red `node --test` regression read as passed when this CLI was
 // itself started under `node --test`, because the nested run reported to the
 // parent and exited 0.
 
-function exec(command, { cwd, timeoutMs }) {
-  const r = spawnSync('/bin/sh', ['-c', command], { cwd, encoding: 'utf8', timeout: timeoutMs, env: commandEnv() });
-  return { status: r.status, stdout: r.stdout ?? '', stderr: r.stderr ?? '' };
-}
-
 import { readFileSync, realpathSync } from 'node:fs';
 import { spawnSync } from 'node:child_process';
 import { resolve } from 'node:path';
 import { fileURLToPath } from 'node:url';
 import { sliceSteps, parseStepFields } from '../parsers/plan-schema.mjs';
 import { firstCommand, runCriteria } from './criteria-runner.mjs';
-import { commandEnv } from './red-proof.mjs';
+import { commandEnv } from '../util/command-env.mjs';
+
+function exec(command, { cwd, timeoutMs }) {
+  const r = spawnSync('/bin/sh', ['-c', command], { cwd, encoding: 'utf8', timeout: timeoutMs, env: commandEnv() });
+  return { status: r.status, stdout: r.stdout ?? '', stderr: r.stderr ?? '' };
+}
 
 export const REGRESSION_FIELD = 'Regression';
 const EXIT = Object.freeze({ passed: 0, absent: 0, failed: 1, blocked: 1, unrunnable: 1, error: 2 });