test(hooks): regression coverage for round 1 review fixes

9 new cases locking in the behavior added by the previous two
commits. Each was verified to fail before the fix and pass after.

Greptile — quote-aware depth counting:
  - blocks $(echo ")"; (npm run dev))
  - blocks (echo ")"; npm run dev)
  - allows $(echo "(npm run dev)") — () inside double-quoted body is literal

Greptile — brace groups:
  - blocks { npm run dev; }
  - blocks echo hi && { npm run dev; }
  - allows {npm run dev} — bash brace-group syntax requires a space after {

CodeRabbit — missing package-manager variants:
  - blocks yarn run dev (yarn 1.x convention)
  - blocks bun dev (bun bare form)

CodeRabbit nitpick — symmetric quote test:
  - blocks echo "$(npm run dev)" — double-quoted substitution still substitutes

The `{npm run dev}` allow case is intentional: bash treats `{` as
a reserved word only when followed by whitespace. The pre-fix code
already passed this through, but until now we never asserted it,
so a future change to brace handling could silently start blocking
literal `{npm` tokens.

docs/ECC-2.0-GA-ROADMAP.md

@@ -135,6 +135,24 @@ As of 2026-05-13:
   check-run on the PR head SHA with ready/blocked hosted executor commands
   and next action text, while keeping check-run publication best-effort so
   bundle generation and analysis comments are not blocked.
+- ECC-Tools PR #64 merged as `72020ef94db94840812977ea7ac37e9344036668`
+  and added PR-facing hosted job dispatch controls:
+  `/ecc-tools analyze --job ...` comments now queue hosted jobs against the
+  PR head SHA, execute them through the existing hosted readiness/evidence
+  gates, post artifacts/findings/next actions back to the PR, and scope
+  idempotency keys by job id so hosted jobs do not collide with bundle
+  analysis.
+- ECC-Tools PR #65 merged as `bacd4adf6a3a629e8d403865456d15f127baaf4e`
+  and added hosted job result history/check-run summaries:
+  queued hosted jobs now cache both the latest result and immutable run records
+  for completed or blocked runs, then publish a non-blocking per-job check-run
+  on the PR head SHA with artifacts, findings, readiness blockers, and next
+  actions.
+- ECC-Tools PR #66 merged as `4e1db48252d068ea5dcf4308b0bc11b0dfe0c9ce`
+  and added a read-only hosted status command:
+  `/ecc-tools analyze --job status` now reads the #65 latest-result cache for
+  the current PR head and posts a compact completed/blocked/not-run table with
+  the next hosted job command, without queueing work or billing usage.
 - Handoff `ecc-supply-chain-audit-20260513-0645.md` under
   `~/.cluster-swarm/handoffs/`
   records the May 13 supply-chain sweep: no active lockfile/manifest hit for
@@ -356,6 +374,18 @@ As of 2026-05-13:
 - ECC-Tools PR #63 publishes the hosted depth-plan check-run after queued PR
   analysis completes, making the six hosted executor commands visible on the
   PR head SHA without turning the check into a merge blocker.
+- ECC-Tools PR #64 wires those commands into the queue: maintainers can comment
+  `/ecc-tools analyze --job ci-diagnostics`, `security-evidence`,
+  `harness-compatibility`, `reference-set-evaluation`, `ai-routing-cost`, or
+  `team-backlog` on a PR and receive hosted job results in a PR comment.
+- ECC-Tools PR #65 persists completed and blocked hosted job results to the
+  analysis cache for 30 days and publishes non-blocking `ECC Tools / Hosted
+  Job: ...` check-runs so maintainers can scan hosted outcomes from the PR
+  checks surface instead of rereading older comments.
+- ECC-Tools PR #66 exposes the cached results from PR comments with
+  `/ecc-tools analyze --job status`, summarizing completed, blocked, and
+  not-yet-run hosted jobs for the PR head and recommending the next hosted job
+  command.
 - ECC PR #1803 landed the contributor Quarkus handling branch after maintainer
   cleanup, current-`main` alignment, full local validation, and preservation of
   the author's removal of incomplete ja-JP and zh-CN Quarkus translations.
@@ -409,10 +439,10 @@ is not complete unless the evidence column exists and has been freshly verified.
 | Claude and Codex plugin publication | Contact/submission path with required artifacts and status | Publication readiness, naming matrix, and May 12 dry-run evidence document plugin validation, clean-checkout Claude tag/install smoke, and Codex marketplace CLI shape | Needs explicit approval for real tag/push and marketplace submission |
 | Articles, tweets, and announcements | X thread, LinkedIn copy, GitHub release copy, push checklist | Draft launch collateral exists under rc.1 release docs | Needs URL-backed refresh |
 | AgentShield enterprise iteration | Policy gates, SARIF, packs, provenance, corpus, HTML reports, exception lifecycle audit, baseline drift Action/CLI surfaces, evidence-pack redaction, harness adapter registry, enterprise research roadmap, supply-chain hardened release path, CI-safe baseline fingerprints, corpus accuracy recommendations, remediation workflow phases, env proxy hijack corpus coverage | PRs #53, #55-#64, #67-#69, and #78-#82 landed with test evidence; native PDF export deferred in favor of self-contained HTML plus print-to-PDF until explicit enterprise demand appears; `docs/architecture/agentshield-enterprise-research-roadmap.md` now has baseline drift, evidence-pack bundle, redaction, adapter-registry, supply-chain hardening, hashed baseline fingerprints, corpus accuracy recommendation, remediation workflow, and env proxy hijack corpus slices landed | Next hosted evidence-pack workflow depth |
-| ECC Tools next-level app | Billing audit, PR checks, deep analyzer, sync backlog, evaluator/RAG corpus, analysis-depth readiness, hosted execution planning, hosted CI diagnostics, hosted security evidence review, hosted harness compatibility audit, hosted reference-set evaluation, hosted AI routing/cost review, hosted team backlog routing, hosted depth-plan check-run | PRs #26-#43 plus #53-#63 landed with test evidence, including AgentShield evidence-pack gap routing, canonical bundle recognition, supply-chain signature gates, PR draft follow-up Linear tracking, evidence-backed/deep-ready repository classification, the `/api/analysis/depth-plan` hosted job plan, `/api/analysis/jobs/ci-diagnostics`, `/api/analysis/jobs/security-evidence-review`, `/api/analysis/jobs/harness-compatibility-audit`, `/api/analysis/jobs/reference-set-evaluation`, `/api/analysis/jobs/ai-routing-cost-review`, `/api/analysis/jobs/team-backlog-routing`, and the `ECC Tools / Hosted Depth Plan` check-run | Hosted operator visibility complete; next work is hosted-job dispatch execution controls |
+| ECC Tools next-level app | Billing audit, PR checks, deep analyzer, sync backlog, evaluator/RAG corpus, analysis-depth readiness, hosted execution planning, hosted CI diagnostics, hosted security evidence review, hosted harness compatibility audit, hosted reference-set evaluation, hosted AI routing/cost review, hosted team backlog routing, hosted depth-plan check-run, PR-comment hosted job dispatch, hosted job result history/check-runs, hosted result status command | PRs #26-#43 plus #53-#66 landed with test evidence, including AgentShield evidence-pack gap routing, canonical bundle recognition, supply-chain signature gates, PR draft follow-up Linear tracking, evidence-backed/deep-ready repository classification, the `/api/analysis/depth-plan` hosted job plan, `/api/analysis/jobs/ci-diagnostics`, `/api/analysis/jobs/security-evidence-review`, `/api/analysis/jobs/harness-compatibility-audit`, `/api/analysis/jobs/reference-set-evaluation`, `/api/analysis/jobs/ai-routing-cost-review`, `/api/analysis/jobs/team-backlog-routing`, the `ECC Tools / Hosted Depth Plan` check-run, `/ecc-tools analyze --job ...` PR-comment dispatch, non-blocking per-hosted-job result check-runs backed by 30-day result cache records, and `/ecc-tools analyze --job status` cache lookup | Next work is evaluator-backed hosted promotion and status-aware depth-plan recommendations |
 | GitGuardian/Dependabot/CodeRabbit-style checks | Non-blocking taxonomy, deterministic follow-up checks, and local supply-chain gates | ECC-Tools risk taxonomy check plus follow-up signals landed, including Skill Quality, Deep Analyzer Evidence, Analyzer Corpus Evidence, RAG/Evaluator Evidence, PR Review/Salvage Evidence, and AgentShield evidence-pack evidence; #1846 added npm registry signature gates; #1848 added the supply-chain incident-response playbook and `pull_request_target` cache-poisoning validator guard; #1851 added the privileged checkout credential-persistence guard; AgentShield #78, JARVIS #13, and ECC-Tools #53 applied the same hardening outside trunk | Current supply-chain gate complete; deeper hosted review features remain future |
 | Harness-agnostic learning system | Audit, adapter matrix, observability, traces, promotion loop | Audit/adapters/observability gates plus `docs/architecture/evaluator-rag-prototype.md`, `examples/evaluator-rag-prototype/`, and ECC-Tools PR #40 define read-only stale-salvage, billing-readiness, CI-failure-diagnosis, harness-config-quality, AgentShield policy-exception, skill-quality evidence, deep-analyzer evidence, and RAG/evaluator comparison scenarios with trace, report, playbook, verifier, and predictive-check artifacts | Local corpus complete; hosted integration remains future |
-| Linear roadmap is detailed | Linear project status plus repo mirror | Repo mirror exists; issue creation was retried on 2026-05-12 and remains blocked by the workspace free issue limit; this May 13 sync adds ECC #1860, AgentShield #78-#82, JARVIS #13, ECC-Tools #53-#63, resolved queue/discussion counts, and Linear project status updates through ECC-Tools #63 | Needs recurring status updates after each merge batch |
+| Linear roadmap is detailed | Linear project status plus repo mirror | Repo mirror exists; issue creation was retried on 2026-05-12 and remains blocked by the workspace free issue limit; this May 13 sync adds ECC #1860, AgentShield #78-#82, JARVIS #13, ECC-Tools #53-#66, resolved queue/discussion counts, and Linear project status updates through ECC-Tools #66 | Needs recurring status updates after each merge batch |
 | Flow separation and progress tracking | Flow lanes with owner artifacts and update cadence | This roadmap defines lanes below and `docs/architecture/progress-sync-contract.md` makes GitHub/Linear/handoff/roadmap sync part of the readiness gate | Active |
 | Realtime Linear sync | Project updates while issue limit is blocked; issues later | ECC-Tools #39 implements opt-in Linear API sync for deferred follow-up backlog items, and ECC-Tools #54 adds copy-ready PR drafts to that backlog when draft PR shells are not opened; `docs/architecture/progress-sync-contract.md` defines the local file-backed realtime boundary while issue capacity is blocked | Needs workspace capacity/config rollout |
 | Observability for self-use | Local readiness gate, traces, status snapshots, HUD/status contract, risk ledger, progress-sync contract | `npm run observability:ready` reports 21/21 | Complete for local gate |
@@ -433,7 +463,7 @@ repo evidence and merge commits.
 | Harness OS core | Audit, adapter matrix, observability docs, `ecc2/` | HUD/session-control acceptance spec | Weekly until GA |
 | Evaluation and RAG | Reference-set validation, harness audit, traces, ECC-Tools corpus | Read-only evaluator/RAG prototype plus stale-salvage, billing-readiness, CI-failure-diagnosis, harness-config-quality, AgentShield policy-exception, skill-quality evidence, deep-analyzer evidence, and RAG/evaluator comparison fixtures | Hosted retrieval/check-run automation plan |
 | AgentShield enterprise | AgentShield PR evidence and roadmap notes | Remediation workflow depth or corpus expansion follow-up | Next implementation batch |
-| ECC Tools app | ECC-Tools PR evidence, billing audit, risk taxonomy, evaluator/RAG corpus | ECC-Tools #53 published the supply-chain workflow hardening branch, #54 tracks copy-ready PR drafts in the Linear/project backlog, #55 classifies analysis-depth readiness, #56 exposes the hosted execution plan, #57 executes the first hosted CI diagnostics job, #58 executes the hosted security evidence review job, #59 executes the hosted harness compatibility audit, #60 executes the hosted reference-set evaluation, #61 executes the hosted AI routing/cost review, #62 executes hosted team backlog routing, and #63 publishes the hosted depth-plan check-run; next work is hosted-job dispatch execution controls | Next implementation batch |
+| ECC Tools app | ECC-Tools PR evidence, billing audit, risk taxonomy, evaluator/RAG corpus | ECC-Tools #53 published the supply-chain workflow hardening branch, #54 tracks copy-ready PR drafts in the Linear/project backlog, #55 classifies analysis-depth readiness, #56 exposes the hosted execution plan, #57 executes the first hosted CI diagnostics job, #58 executes the hosted security evidence review job, #59 executes the hosted harness compatibility audit, #60 executes the hosted reference-set evaluation, #61 executes the hosted AI routing/cost review, #62 executes hosted team backlog routing, #63 publishes the hosted depth-plan check-run, and #64 dispatches hosted jobs from PR comments; next work is hosted result history/check-run summaries | Next implementation batch |
 | Linear progress | Linear project status updates, `docs/architecture/progress-sync-contract.md`, and this mirror | Status update with queue/evidence/missing gates | Every significant merge batch |
 
 The project status update should always include:
@@ -650,10 +680,9 @@ Acceptance:
    PR #82 expanded corpus coverage for env proxy hijacks and out-of-band
    exfiltration; and ECC-Tools PRs #42/#43 now route and recognize evidence
    packs. The next slice is hosted evidence-pack workflow depth.
-2. Build hosted-job dispatch execution controls on top of the #63 hosted
+2. Feed the #66 status surface back into hosted depth-plan recommendations so
-   depth-plan check-run so maintainers can queue the selected CI, security,
+   queued analysis can suggest the next unrun or newly blocked hosted job from
-   harness, reference-set, AI-routing, or team-backlog job from the PR-facing
+   cached outcomes, not only static readiness.
-   operator surface instead of manually calling the internal endpoints.
 3. Enable/configure the merged Linear backlog sync path after workspace issue
    capacity clears or the Linear workspace is upgraded, then verify PR-draft
    salvage items land in the expected project.

rules/ruby/hooks.md

@@ -15,7 +15,7 @@ paths:
 Configure project-local hooks to prefer binstubs and checked-in tooling:
 
 - **RuboCop**: run `bundle exec rubocop -A <file>` or the project's safer formatter command after Ruby edits.
-- **Brakeman**: run `bundle exec brakeman --no-progress` after security-sensitive Rails changes.
+- **Brakeman**: run `bundle exec brakeman --no-pager` after security-sensitive Rails changes.
 - **Tests**: run the narrowest matching `bin/rails test ...` or `bundle exec rspec ...` command for touched files.
 - **Bundler audit**: run `bundle exec bundle-audit check --update` when `Gemfile` or `Gemfile.lock` changes and the project has bundler-audit installed.
 
@@ -29,7 +29,7 @@ Configure project-local hooks to prefer binstubs and checked-in tooling:
 
 ```bash
 bundle exec rubocop
-bundle exec brakeman --no-progress
+bundle exec brakeman --no-pager
 bin/rails test
 bundle exec rspec
 ```

rules/ruby/security.md

@@ -34,8 +34,8 @@ paths:
 - Run dependency checks when the lockfile changes:
 
 ```bash
-bundle exec bundle-audit check --update
+bundle audit check --update
-bundle exec brakeman --no-progress
+bundle exec brakeman --no-pager
 ```
 
 - Review new gems for maintainer activity, native extension risk, transitive dependencies, and whether the same behavior can be implemented with Rails core.

scripts/hooks/pre-bash-dev-server-block.js

@@ -4,6 +4,10 @@
 const MAX_STDIN = 1024 * 1024;
 const path = require('path');
 const { splitShellSegments } = require('../lib/shell-split');
+const {
+  extractCommandSubstitutions,
+  extractSubshellGroups
+} = require('../lib/shell-substitution');
 
 const DEV_COMMAND_WORDS = new Set([
   'npm',
@@ -123,6 +127,8 @@ function getLeadingCommandWord(segment) {
       continue;
     }
 
+    if (token === '{' || token === '}') continue;
+
     if (/^[A-Za-z_][A-Za-z0-9_]*=.*/.test(token)) continue;
 
     const normalizedToken = normalizeCommandWord(token);
@@ -154,23 +160,55 @@ process.stdin.on('data', chunk => {
   }
 });
 
+const TMUX_LAUNCHER = /^\s*tmux\s+(new|new-session|new-window|split-window)\b/;
+const DEV_PATTERN = /\b(npm\s+run\s+dev|pnpm(?:\s+run)?\s+dev|yarn(?:\s+run)?\s+dev|bun(?:\s+run)?\s+dev)\b/;
+
+/**
+ * Collect every command-line segment we should evaluate. Returns the top-level
+ * segments first, then segments harvested from `$(...)` / backtick command
+ * substitutions and plain `(...)` subshell groups, recursively.
+ *
+ * Without this expansion the leading-command and dev-pattern check below only
+ * sees the outermost command, so wrappers like `$(npm run dev)` and
+ * `(npm run dev)` (which still spawn a dev server) sneak past.
+ */
+function collectCheckSegments(cmd) {
+  const segments = [...splitShellSegments(cmd)];
+  const queue = [cmd];
+  const seen = new Set();
+
+  while (queue.length) {
+    const current = queue.shift();
+    if (seen.has(current)) continue;
+    seen.add(current);
+
+    for (const body of extractCommandSubstitutions(current)) {
+      for (const seg of splitShellSegments(body)) segments.push(seg);
+      queue.push(body);
+    }
+    for (const body of extractSubshellGroups(current)) {
+      for (const seg of splitShellSegments(body)) segments.push(seg);
+      queue.push(body);
+    }
+  }
+
+  return segments;
+}
+
+function isBlockedDevSegment(segment) {
+  const commandWord = getLeadingCommandWord(segment);
+  if (!commandWord || !DEV_COMMAND_WORDS.has(commandWord)) return false;
+  return DEV_PATTERN.test(segment) && !TMUX_LAUNCHER.test(segment);
+}
+
 process.stdin.on('end', () => {
   try {
     const input = JSON.parse(raw);
     const cmd = String(input.tool_input?.command || '');
 
     if (process.platform !== 'win32') {
-      const segments = splitShellSegments(cmd);
+      const segments = collectCheckSegments(cmd);
-      const tmuxLauncher = /^\s*tmux\s+(new|new-session|new-window|split-window)\b/;
+      const hasBlockedDev = segments.some(isBlockedDevSegment);
-      const devPattern = /\b(npm\s+run\s+dev|pnpm(?:\s+run)?\s+dev|yarn\s+dev|bun\s+run\s+dev)\b/;
-
-      const hasBlockedDev = segments.some(segment => {
-        const commandWord = getLeadingCommandWord(segment);
-        if (!commandWord || !DEV_COMMAND_WORDS.has(commandWord)) {
-          return false;
-        }
-        return devPattern.test(segment) && !tmuxLauncher.test(segment);
-      });
 
       if (hasBlockedDev) {
         console.error('[Hook] BLOCKED: Dev server must run in tmux for log access');

scripts/lib/shell-substitution.js

@@ -0,0 +1,246 @@
+'use strict';
+
+/**
+ * Extract executable command-substitution bodies from a shell line.
+ *
+ * Single quotes are literal, so substitutions inside them are ignored;
+ * double quotes still permit substitutions, so those bodies are scanned
+ * before quoted text is stripped. Returns each substitution body plus
+ * any nested substitutions discovered recursively.
+ *
+ * Originally introduced in scripts/hooks/gateguard-fact-force.js
+ * (PR #1853 round 2). Extracted to a shared lib so other PreToolUse
+ * hooks that need the same "scan inside `$(...)` and backticks"
+ * behavior can reuse it without duplicating the parser.
+ *
+ * @param {string} input
+ * @returns {string[]}
+ */
+function extractCommandSubstitutions(input) {
+  const source = String(input || '');
+  const substitutions = [];
+  let inSingle = false;
+  let inDouble = false;
+
+  for (let i = 0; i < source.length; i++) {
+    const ch = source[i];
+    const prev = source[i - 1];
+
+    if (ch === '\\' && !inSingle) {
+      i += 1;
+      continue;
+    }
+
+    if (ch === "'" && !inDouble && prev !== '\\') {
+      inSingle = !inSingle;
+      continue;
+    }
+
+    if (ch === '"' && !inSingle && prev !== '\\') {
+      inDouble = !inDouble;
+      continue;
+    }
+
+    if (inSingle) {
+      continue;
+    }
+
+    if (ch === '`') {
+      let body = '';
+      i += 1;
+      while (i < source.length) {
+        const inner = source[i];
+        if (inner === '\\') {
+          body += inner;
+          if (i + 1 < source.length) {
+            body += source[i + 1];
+            i += 2;
+            continue;
+          }
+        }
+        if (inner === '`') {
+          break;
+        }
+        body += inner;
+        i += 1;
+      }
+      if (body.trim()) {
+        substitutions.push(body);
+        substitutions.push(...extractCommandSubstitutions(body));
+      }
+      continue;
+    }
+
+    if (ch === '$' && source[i + 1] === '(') {
+      let depth = 1;
+      let body = '';
+      let bodyInSingle = false;
+      let bodyInDouble = false;
+      i += 2;
+      while (i < source.length && depth > 0) {
+        const inner = source[i];
+        const innerPrev = source[i - 1];
+        if (inner === '\\' && !bodyInSingle) {
+          body += inner;
+          if (i + 1 < source.length) {
+            body += source[i + 1];
+            i += 2;
+            continue;
+          }
+        }
+        if (inner === "'" && !bodyInDouble && innerPrev !== '\\') {
+          bodyInSingle = !bodyInSingle;
+        } else if (inner === '"' && !bodyInSingle && innerPrev !== '\\') {
+          bodyInDouble = !bodyInDouble;
+        } else if (!bodyInSingle && !bodyInDouble) {
+          if (inner === '(') {
+            depth += 1;
+          } else if (inner === ')') {
+            depth -= 1;
+            if (depth === 0) {
+              break;
+            }
+          }
+        }
+        body += inner;
+        i += 1;
+      }
+      if (body.trim()) {
+        substitutions.push(body);
+        substitutions.push(...extractCommandSubstitutions(body));
+      }
+    }
+  }
+
+  return substitutions;
+}
+
+/**
+ * Extract bodies of plain `(...)` subshell groups.
+ *
+ * Bash treats `(npm run dev)` as a subshell that executes its contents, but
+ * the regex-light segment splitters used by our PreToolUse hooks don't peer
+ * inside those parens. This helper finds top-level `(...)` groups (skipping
+ * `$(...)` command substitutions and backticks, which `extractCommandSubstitutions`
+ * already covers) and returns each body, recursing for nested groups.
+ *
+ * Quote semantics:
+ * - Single quotes are literal: `'( ... )'` is a string, not a subshell.
+ * - Double quotes are literal *for parens*: `"( ... )"` is a string too —
+ *   bash only honors `$( )` inside double quotes, not bare `( )`.
+ *
+ * @param {string} input
+ * @returns {string[]}
+ */
+function extractSubshellGroups(input) {
+  const source = String(input || '');
+  const groups = [];
+  let inSingle = false;
+  let inDouble = false;
+
+  for (let i = 0; i < source.length; i++) {
+    const ch = source[i];
+    const prev = source[i - 1];
+
+    if (ch === '\\' && !inSingle) {
+      i += 1;
+      continue;
+    }
+
+    if (ch === "'" && !inDouble && prev !== '\\') {
+      inSingle = !inSingle;
+      continue;
+    }
+
+    if (ch === '"' && !inSingle && prev !== '\\') {
+      inDouble = !inDouble;
+      continue;
+    }
+
+    if (inSingle || inDouble) {
+      continue;
+    }
+
+    if (ch === '$' && source[i + 1] === '(') {
+      let depth = 1;
+      let skipInSingle = false;
+      let skipInDouble = false;
+      i += 2;
+      while (i < source.length && depth > 0) {
+        const inner = source[i];
+        const innerPrev = source[i - 1];
+        if (inner === '\\' && !skipInSingle) {
+          i += 2;
+          continue;
+        }
+        if (inner === "'" && !skipInDouble && innerPrev !== '\\') {
+          skipInSingle = !skipInSingle;
+        } else if (inner === '"' && !skipInSingle && innerPrev !== '\\') {
+          skipInDouble = !skipInDouble;
+        } else if (!skipInSingle && !skipInDouble) {
+          if (inner === '(') depth += 1;
+          else if (inner === ')') depth -= 1;
+        }
+        i += 1;
+      }
+      i -= 1;
+      continue;
+    }
+
+    if (ch === '`') {
+      i += 1;
+      while (i < source.length && source[i] !== '`') {
+        if (source[i] === '\\' && i + 1 < source.length) {
+          i += 2;
+          continue;
+        }
+        i += 1;
+      }
+      continue;
+    }
+
+    if (ch === '(') {
+      let depth = 1;
+      let body = '';
+      let bodyInSingle = false;
+      let bodyInDouble = false;
+      i += 1;
+      while (i < source.length && depth > 0) {
+        const inner = source[i];
+        const innerPrev = source[i - 1];
+        if (inner === '\\' && !bodyInSingle) {
+          body += inner;
+          if (i + 1 < source.length) {
+            body += source[i + 1];
+            i += 2;
+            continue;
+          }
+        }
+        if (inner === "'" && !bodyInDouble && innerPrev !== '\\') {
+          bodyInSingle = !bodyInSingle;
+        } else if (inner === '"' && !bodyInSingle && innerPrev !== '\\') {
+          bodyInDouble = !bodyInDouble;
+        } else if (!bodyInSingle && !bodyInDouble) {
+          if (inner === '(') {
+            depth += 1;
+          } else if (inner === ')') {
+            depth -= 1;
+            if (depth === 0) {
+              break;
+            }
+          }
+        }
+        body += inner;
+        i += 1;
+      }
+      if (body.trim()) {
+        groups.push(body);
+        groups.push(...extractSubshellGroups(body));
+      }
+    }
+  }
+
+  return groups;
+}
+
+module.exports = { extractCommandSubstitutions, extractSubshellGroups };

tests/hooks/pre-bash-dev-server-block.test.js

@@ -89,6 +89,110 @@ function runTests() {
     assert.strictEqual(result.code, 0, `Expected exit code 0, got ${result.code}`);
   }) ? passed++ : failed++);
 
+  // --- Subshell bypass regression (issue: dev server slipped past via $(), ``, ()) ---
+
+  if (!isWindows) {
+    (test('blocks $(npm run dev) — command substitution', () => {
+      const result = runScript('$(npm run dev)');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+      assert.ok(result.stderr.includes('BLOCKED'), 'expected BLOCKED in stderr');
+    }) ? passed++ : failed++);
+
+    (test('blocks `npm run dev` — backtick substitution', () => {
+      const result = runScript('`npm run dev`');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks echo $(npm run dev) — substitution nested in argument', () => {
+      const result = runScript('echo $(npm run dev)');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks (npm run dev) — plain subshell group', () => {
+      const result = runScript('(npm run dev)');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks $(echo a; npm run dev) — substitution with sequenced segments', () => {
+      const result = runScript('$(echo a; npm run dev)');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks (pnpm dev) — plain subshell group with pnpm', () => {
+      const result = runScript('(pnpm dev)');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('allows tmux launcher inside subshell wrapping (exit code 0)', () => {
+      const result = runScript('(tmux new-session -d -s dev "npm run dev")');
+      assert.strictEqual(result.code, 0, `Expected exit code 0, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('allows single-quoted "(npm run dev)" — literal string, not a subshell', () => {
+      const result = runScript("git commit -m '(npm run dev)'");
+      assert.strictEqual(result.code, 0, `Expected exit code 0, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('allows double-quoted "(npm run dev)" — literal in double quotes (bash does not subshell)', () => {
+      const result = runScript('echo "(npm run dev)"');
+      assert.strictEqual(result.code, 0, `Expected exit code 0, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test("allows single-quoted '$(npm run dev)' — literal string, no substitution", () => {
+      const result = runScript("git commit -m '$(npm run dev) fix'");
+      assert.strictEqual(result.code, 0, `Expected exit code 0, got ${result.code}`);
+    }) ? passed++ : failed++);
+  }
+
+  // --- Round 1 review fixes (Greptile + CodeRabbit on PR #1889) ---
+
+  if (!isWindows) {
+    (test('blocks $(echo ")"; (npm run dev)) — quoted ) does not terminate $() early', () => {
+      const result = runScript('$(echo ")"; (npm run dev))');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks (echo ")"; npm run dev) — quoted ) does not terminate (...) early', () => {
+      const result = runScript('(echo ")"; npm run dev)');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('allows $(echo "(npm run dev)") — () inside double-quoted substitution body is literal', () => {
+      const result = runScript('$(echo "(npm run dev)")');
+      assert.strictEqual(result.code, 0, `Expected exit code 0, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks { npm run dev; } — brace group runs in current shell', () => {
+      const result = runScript('{ npm run dev; }');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks echo hi && { npm run dev; } — brace group after &&', () => {
+      const result = runScript('echo hi && { npm run dev; }');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('allows {npm run dev} — bash requires space after { to form a group', () => {
+      const result = runScript('{npm run dev}');
+      assert.strictEqual(result.code, 0, `Expected exit code 0, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks yarn run dev — yarn 1.x convention', () => {
+      const result = runScript('yarn run dev');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks bun dev — bun bare form', () => {
+      const result = runScript('bun dev');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+
+    (test('blocks "$(npm run dev)" — double-quoted substitution still substitutes', () => {
+      const result = runScript('echo "$(npm run dev)"');
+      assert.strictEqual(result.code, 2, `Expected exit code 2, got ${result.code}`);
+    }) ? passed++ : failed++);
+  }
+
   // --- Edge cases ---
 
   (test('empty/invalid input passes through (exit code 0)', () => {