fix: round 2 of the release review of 6.3.0

Round 2 (v6.2.0..0d044f6, BLOCK: 2 BLOCKER, 11 MAJOR, 1 MINOR), each fixed
behind a test that failed first.

- The git runner checks only words /bin/sh passes through unchanged (no
  quote, backslash, $, glob or brace) and refuses --output and its
  abbreviations: round 1's --output refusal was bypassed by quoting.
- fieldPaths: backticked paths are kept as written, parentheses and all; in
  plain text every path-like word counts, and a parenthesised note does not.
- plan-validator --steps-from reads the plan's ## Verification for an
  appended End-to-end step, and warns instead of failing under --soft.
- regression-check prints progress_status, the value progress.json takes;
  /trekexecute copies it.
- release-check: a plugin in a subdirectory is checked in its own directory,
  the suite is not run when a cheaper check already makes the answer exit 2,
  and a bad argument or a crash is exit 2.
- Skill routing looks a skill up among skills only, and builds the corpus
  vectors once.
- /trekexecute Phase 7.2 says plainly that remediation steps in the review
  template's own form stop with a re-plan; making them runnable is a later
  order (operator 2026-10-10).

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

lib/validators/plan-validator.mjs

@@ -99,7 +99,9 @@ const WAY_IN = 'A check the allowlist has no name for (a pipe, `jq`, `grep`, the
 function checkRunnable(text, sections, opts) {
   const out = [];
   const criteria = parsePlanVerification(text);
-  for (const c of criteria) {
+  // opts.stepsOnly: only the given steps are judged; ## Verification is read
+  // for the commands it lists, never reported on (the --steps-from path).
+  for (const c of opts.stepsOnly ? [] : criteria) {
     const r = runnableCheck(c, opts);
     if (!r.runnable) {
       out.push(issue('PLAN_VERIFICATION_NOT_RUNNABLE',
@@ -302,7 +304,7 @@ export function validatePlanContent(rawText, opts = {}) {
     const appended = sections.filter((s) => Number(s.n) >= stepsFrom);
     const stepIssues = [
       ...checkSteps(appended).filter((i) => i.code !== 'PLAN_NO_END_TO_END'),
-      ...checkRunnable('', appended, { cwd: opts.cwd }),
+      ...checkRunnable(text, appended, { cwd: opts.cwd, stepsOnly: true }),
     ];
     for (const s of appended) {
       if (!parseStepFields(s.body).has('Verify')) {
@@ -310,7 +312,8 @@ export function validatePlanContent(rawText, opts = {}) {
           'An appended step needs one test command: proof of red and the done line run it.'));
       }
     }
-    errors.push(...stepIssues);
+    if (strict) errors.push(...stepIssues);
+    else warnings.push(...stepIssues);
   }
 
   const ceremony = extractPlanCeremony(text);