feat: always-full eng review + ship review gate persistence (v0.5.4) (#135)
Remove SMALL/BIG CHANGE menu from /plan-eng-review — every plan gets the
full interactive review. Scope reduction is now proactive (only when
complexity check triggers) rather than a menu item.
Add review gate override persistence to /ship — when the user says "ship
anyway" or "not relevant", that decision is saved to the branch's
reviews.jsonl so subsequent /ship runs don't re-ask.
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
feat: SELECTIVE EXPANSION + smarter ship gates (v0.5.3) (#134)
* feat: SELECTIVE EXPANSION mode + user control for CEO review
Add 4th mode to /plan-ceo-review: SELECTIVE EXPANSION holds current scope
as baseline but surfaces expansion opportunities one by one for cherry-picking.
All modes now present every scope-expanding idea as individual AskUserQuestion
calls — user opts in or out of each one. EXPANSION recommends enthusiastically,
SELECTIVE recommends neutrally. CEO plan persistence writes decisions to disk.
* feat: review dashboard — eng required, CEO/design optional
Only Eng Review gates shipping. CEO Review recommended for big product
changes, Design Review for UI work — both informational only. Adds
skip_eng_review global config to disable the gate entirely.
* chore: bump version and changelog (v0.5.3)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
feat: Review Readiness Dashboard + gstack-slug helper (v0.5.1) (#130)
* feat: add bin/gstack-slug helper + migrate all inline SLUG computation
Extract the opaque SLUG sed pipeline into a shared 5-line shell script.
Replace 8 inline copies across templates with eval $(gstack-slug).
Sanitizes branch names (/ → -) to prevent subdirectory creation.
* feat: review readiness dashboard — track CEO/Eng/Design reviews per branch
Each review skill logs its result to JSONL. A shared {{REVIEW_DASHBOARD}}
placeholder displays run counts, timestamps, and a CLEARED TO SHIP verdict.
/ship pre-flight reads the dashboard and prompts when reviews are missing.
* chore: bump version and changelog (v0.5.1)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
feat: /plan-design-review + /qa-design-review skills (v0.5.0) (#102)
* feat: add {{DESIGN_METHODOLOGY}} resolver and register design review skills
Add generateDesignMethodology() to gen-skill-docs.ts with 10-category, 80-item
design audit checklist. Register plan-design-review and qa-design-review templates
in findTemplates(). Add both skills to skill-check.ts SKILL_FILES. Add command
and snapshot flag validation tests for both skills in skill-validation.test.ts.
* feat: add /plan-design-review and /qa-design-review skills
/plan-design-review: report-only designer audit with letter grades, AI slop
scoring, structured first impression, design system extraction, DESIGN.md
inference and export offer. Never modifies code.
/qa-design-review: same audit, then iterative fix loop with style(design):
commits, CSS-safe WTF heuristic, before/after screenshots, final re-audit.
* chore: bump version and changelog (v0.5.0)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* docs: update README, ARCHITECTURE for design review skills (v0.5.0)
- Update skill count to 11, add /plan-design-review and /qa-design-review
to skill table, install/uninstall commands, and demo walkthrough
- Add narrative sections: "senior designer mode" and "designer who codes mode"
with compelling examples showing AI Slop detection and design system inference
- Add {{DESIGN_METHODOLOGY}} to ARCHITECTURE.md placeholder table
- Extend demo to show full plan→eng→review→ship→qa→design-review pipeline
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* chore: regenerate design review SKILL.md files after merge from main
Picks up BASE_BRANCH_DETECT resolver and updated contributor mode from main.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* feat: add /design-consultation skill — design consultant that creates DESIGN.md
6-phase consultant flow: product context → competitive research (WebSearch) →
complete coherent proposal → drill-downs on demand → font+color preview page →
write DESIGN.md + update CLAUDE.md. Opinionated recommendations grounded in
product context, not menu-driven forms.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* test: add E2E tests for design skill family (7 tests + LLM quality judge)
Tests 1-4: /design-consultation (core flow, research integration, existing
DESIGN.md handling, font+color preview generation).
Tests 5-6: /plan-design-review (audit report, DESIGN.md export).
Test 7: /qa-design-review (audit + fix loop).
LLM judge validates font blacklist compliance, coherence, and AI slop avoidance.
Also adds plan-design-review + qa-design-review to ALL_SKILLS test array.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* chore: mark /design-consultation as shipped in TODOS.md
Renamed from /setup-design-md to reflect the consultant approach.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
feat: Fix-First Review — auto-fix obvious issues, ask about hard ones (v0.4.5) (#116)
* feat: Fix-First Review — auto-fix obvious issues, ask about hard ones
Replace the CRITICAL-only AskUserQuestion flow with Fix-First:
- Every finding gets action (not just critical ones)
- AUTO-FIX items (dead code, N+1, stale comments) applied directly
- ASK items (security, race conditions, design decisions) batched
into at most one AskUserQuestion
- Fix-First Heuristic in checklist.md (single source of truth)
- Gate Classification → Severity Classification rename
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* chore: bump version and changelog (v0.4.5)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* docs: polish CHANGELOG v0.4.5 voice — lead with user benefit
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
feat: /document-release skill — post-ship doc updates (v0.4.3) (#109)
* docs: update project documentation for v0.4.2
- README: skill count 9→10, added /document-release to skills table,
install/uninstall sections, and dedicated section with example
- CHANGELOG: added /document-release bullet to v0.4.2 entry
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* feat: add /document-release skill with smart VERSION handling
New skill runs after /ship but before PR merge. Reads every doc file,
cross-references the diff, auto-updates factual changes, asks about
risky edits. CHANGELOG clobber protection: never uses Write tool on
CHANGELOG.md, only Edit with exact old_string matches.
Smart VERSION logic: instead of silently skipping already-bumped
versions, compares CHANGELOG entry scope against full diff and asks
if significant uncovered changes exist.
Also fixes gstack-upgrade/SKILL.md missing from skill-check.ts
SKILL_FILES array (existing inconsistency with gen-skill-docs.ts).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* feat: /review Step 5.6 — documentation staleness check
Review skill now cross-references code changes against doc files.
If a doc describes a feature that changed but the doc wasn't updated,
flags it as INFORMATIONAL with a pointer to /document-release.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* test: /document-release E2E with CHANGELOG clobber guard
E2E test creates a repo with existing CHANGELOG entries, runs
/document-release, and asserts original entries survive. Critical
guardrail against the incident where an agent replaced CHANGELOG
entries during conflict resolution.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* chore: bump to v0.4.3 — /document-release skill
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* chore: regenerate SKILL.md files after merge
* chore: regenerate SKILL.md files after merge
---------
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
feat: always-on ELI16 + branch detection (v0.4.3) (#108)
* feat: always-on ELI16 + branch detection in preamble
- Add _BRANCH detection to preamble bash block (git branch --show-current)
- Merge ELI16 rules into default AskUserQuestion format (always-on)
- Remove _SESSIONS >= 3 conditional — better questions always
- Add simplification rules: plain English, no jargon, no raw function names
- Update tests for branch detection and simplification regression guard
* chore: bump version and changelog (v0.4.3)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
feat: await support in browse js/eval + contributor mode v2 (#104)
* feat: support await in $B js and eval commands
Auto-wrap await expressions in async IIFE context so
$B js "await fetch(...)" works without SyntaxError.
- hasAwait() strips comments before detection
- js: expression wrapping (async()=>(expr))()
- eval: smart wrapping — single-line=expression, multi-line=block
- 6 new unit tests covering async, false-positive, and return semantics
* feat: redesign contributor mode — periodic reflection with 0-10 rating
Replace passive "report when things break" with active reflection:
- Rate gstack experience 0-10 at workflow step boundaries
- Historical calibration example (await bug) anchors the reporting bar
- "What would make this a 10" field focuses on actionable improvements
- Removed category lists in favor of judgment-based assessment
* test: add deterministic contributor mode preamble validation
40 new skill-validation tests (4 checks × 10 skills) verify:
- 0-10 rating scale present
- Calibration example present
- "What would make this a 10" field present
- Periodic reflection (not per-command)
Update existing E2E contributor eval for new report format.
* chore: bump version and changelog (v0.4.2)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: improve contributor mode + qa-quick E2E reliability
Contributor mode:
- Add "do not truncate" directive to template — agent was stopping
after "My rating" without completing Steps/Raw output/What would
make this a 10 sections
- Restore assertions for Steps to reproduce and Date footer
QA quick:
- Make test server URL prominent: top of prompt, explicit "already
running" and "do NOT discover ports" instructions
- Bump session timeout 180s→240s and test timeout 240s→300s
- Set B= at top of prompt (was buried in prose)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: use flexible assertions for contributor mode E2E
Agent writes thorough reports with creative section names
("Repro Steps" vs "Steps to reproduce"). Match intent not formatting:
- /repro|steps to reproduce/ for reproduction steps
- /date.*2026/ for date footer presence
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* docs: add E2E eval failure blame protocol
"Not related to our changes" is an extraordinary claim that requires
extraordinary proof. When evals fail during /ship:
1. Run the same eval on main — prove it fails there too
2. If it passes on main, it IS your change — trace the blame
3. If you can't verify, say "unverified" not "pre-existing"
Added to CLAUDE.md and as a comment in skill-e2e.test.ts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* docs: update CONTRIBUTING.md and BROWSER.md for v0.4.2
CONTRIBUTING.md: update contributor mode description — now describes
periodic 0-10 reflection loop instead of passive friction detection.
BROWSER.md: add js/eval async documentation — await expressions are
auto-wrapped in async context, single-line eval returns values directly.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: restore v0.4.2 changelog entries lost during cherry-pick conflict
The base branch detection entries from main were dropped when resolving
the CHANGELOG conflict — should have merged both sets, not replaced.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
fix: dynamic base branch detection across all SKILL templates (v0.3.10) (#81)
* feat: add {{BASE_BRANCH_DETECT}} resolver to gen-skill-docs
DRY placeholder for dynamic base branch detection across PR-targeting
skills. Detects via gh pr view (existing PR base) → gh repo view
(repo default) → fallback to main.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix: ship skill detects base branch instead of hardcoding main
Replaces ~14 hardcoded 'main' references with dynamic detection via
{{BASE_BRANCH_DETECT}}. Fixes stacked branches and Conductor workspaces
targeting non-main branches. Adds --base <base> to gh pr create.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix: review, qa, plan-ceo-review detect base branch dynamically
Same pattern as ship: replaces hardcoded 'main' with {{BASE_BRANCH_DETECT}}.
Also cleans up qa bash-isms (REPORT_DIR variable, port chaining).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix: retro detects default branch instead of hardcoding origin/main
Retro queries commit history (not PR targets), so uses simpler detection:
gh repo view defaultBranchRef. Replaces ~11 origin/main refs with
origin/<default>.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* docs: add explicit cross-step references in gstack-upgrade template
Bash blocks are self-contained, but cross-block variable references
(INSTALL_DIR from Step 2) were implicit. Adds prose making them explicit.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* docs+test: SKILL authoring guidance + regression tests
Adds "Writing SKILL templates" section to CLAUDE.md explaining that
templates are prompts, not scripts. Adds validation test catching
hardcoded 'main' in git commands, and resolver content test.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* docs: update ARCHITECTURE + CONTRIBUTING for new placeholders
Add {{BASE_BRANCH_DETECT}} to ARCHITECTURE.md placeholder list.
Cross-reference CLAUDE.md template authoring guidance from CONTRIBUTING.md.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* chore: bump version and changelog (v0.3.10)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: add missing blank line between resolver functions
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* test: add 3 E2E smoke tests for base branch detection
- /review: verifies Step 0 detection + git diff against detected base
- /ship: truncated dry-run (Steps 0-1 only, no push/PR), asserts no
destructive actions
- /retro: verifies default branch detection for git log queries
Covers the {{BASE_BRANCH_DETECT}} resolver path (review), the ship
template's dual abort check, and retro's inline detection pattern.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* chore: bump version and changelog (v0.4.2)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
feat: contributor mode, session awareness, recommendation format (#90)
* feat: contributor mode, session awareness, universal RECOMMENDATION format
- Rename {{UPDATE_CHECK}} → {{PREAMBLE}} across all 10 skill templates
- Add session tracking (touch ~/.gstack/sessions/$PPID, count active sessions)
- ELI16 mode when 3+ concurrent sessions detected (re-ground user on context)
- Contributor mode: auto-file field reports to ~/.gstack/contributor-logs/
- Universal AskUserQuestion format: context → question → RECOMMENDATION → options
- Update plan-ceo-review and plan-eng-review to reference preamble baseline
- Add vendored symlink awareness section to CLAUDE.md
- Rewrite CONTRIBUTING.md with contributor workflow and cross-project testing
- Add tests for contributor mode and session awareness in generated output
- Add E2E eval for contributor mode report filing
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* feat: add Enum & Value Completeness to /review critical checklist
New CRITICAL review category that traces new enum values, status strings,
and type constants through every consumer outside the diff. Catches the
class of bugs where a new value is added but not handled in all switch/case
chains, allowlists, or frontend-backend contracts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* chore: bump v0.4.1, user-facing changelog, update qa-only template and architecture docs
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* docs: add CHANGELOG style guide — user-facing, sell the feature
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* docs: rewrite v0.4.1 changelog to be user-facing and sell the features
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* feat: add evals for RECOMMENDATION format, session awareness, and enum completeness
Free tests (Tier 1): RECOMMENDATION format + session awareness in all
preamble SKILL.md files, enum completeness checklist structure and CRITICAL
classification.
E2E eval: /review catches missed enum handlers when a new status value
is added but not handled in case/switch and notify methods.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* feat: add E2E eval for session awareness ELI16 mode
Stubs _SESSIONS=4, gives agent a decision point on feature/add-payments
branch, verifies the output re-grounds the user with project, branch,
context, and RECOMMENDATION — the ELI16 mode behavior for 3+ sessions.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix: contributor mode eval marked FAIL due to expected browse error
The test intentionally runs a nonexistent binary to trigger contributor
mode. The session runner's browse error detection catches "no such file
or directory...browse" and sets browseErrors, causing recordE2E to mark
passed=false. Override passed to check only exitReason since the browse
error is the expected scenario.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
feat: QA restructure, browser ref staleness, eval efficiency metrics (v0.4.0) (#83)
* feat: browser ref staleness detection via async count() validation
resolveRef() now checks element count to detect stale refs after page
mutations (e.g. SPA navigation). RefEntry stores role+name metadata
for better diagnostics. 3 new snapshot tests for staleness detection.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* feat: qa-only skill, qa fix loop, plan-to-QA artifact flow
Add /qa-only (report-only, Edit tool blocked), restructure /qa with
find-fix-verify cycle, add {{QA_METHODOLOGY}} DRY placeholder for
shared methodology. /plan-eng-review now writes test-plan artifacts
to ~/.gstack/projects/<slug>/ for QA consumption.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* feat: eval efficiency metrics — turns, duration, commentary across all surfaces
Add generateCommentary() for natural-language delta interpretation,
per-test turns/duration in comparison and summary output, judgePassed
unit tests, 3 new E2E tests (qa-only, qa fix loop, plan artifact).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* chore: bump version and changelog (v0.4.0)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* docs: update ARCHITECTURE, BROWSER, CONTRIBUTING, README for v0.4.0
- ARCHITECTURE: add ref staleness detection section, update RefEntry type
- BROWSER: add ref staleness paragraph to snapshot system docs
- CONTRIBUTING: update eval tool descriptions with commentary feature
- README: fix missing qa-only in project-local uninstall command
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* docs: add user-facing benefit descriptions to v0.4.0 changelog
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
feat: TODOS-aware skills, 2-tier Greptile replies, gitignore fix (#61)
* fix: log non-ENOENT errors in ensureStateDir() instead of silently swallowing
Replace bare catch {} with ENOENT-only silence. Non-ENOENT errors (EACCES,
ENOSPC) are now logged to .gstack/browse-server.log. Includes test for
permission-denied scenario with chmod 444.
* feat: merge TODO.md + TODOS.md into unified backlog with shared format reference
Merge TODO.md (roadmap) and TODOS.md (near-term) into one file organized by
skill/component with P0-P4 priority ordering and Completed section. Add shared
review/TODOS-format.md for canonical format. Add static validation tests.
* feat: add 2-tier Greptile reply system with escalation detection
Add reply templates (Tier 1 friendly, Tier 2 firm), explicit escalation
detection algorithm, and severity re-ranking guidance to greptile-triage.md.
* feat: cross-skill TODOS awareness + Greptile template refs in all skills
/ship Step 5.5: auto-detect completed TODOs, offer reorganization.
/review Step 5.5: cross-reference PR against open TODOs.
/plan-ceo-review, /plan-eng-review: TODOS context in planning.
/retro: Backlog Health metric. /qa: bug TODO context in diff-aware mode.
All Greptile-aware skills now reference reply templates and escalation detection.
* chore: bump version and changelog (v0.3.8)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* docs: update CONTRIBUTING.md for v0.3.8 changes
Clarify test tier cost table (Tier 3 standalone vs combined), add TODOS.md
to "Things to know", mention Greptile triage in ship workflow description.
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
fix: harden planted-bug eval prompt for reliable form testing
Phase 3 was too vague ("click every nav link") causing the agent to
wander instead of systematically testing form fields. Now explicitly
directs: fill every input, clear it, try invalid values, submit and
check console. Added Phase 4 finalize step to ensure report is updated
with all findings.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Merge pull request #55 from garrytan/v0.3.6-qa-upgrades
feat: E2E observability + eval infrastructure + all skills templated
fix: auto-clear stale heartbeat when process is dead
Add PID to heartbeat file. eval-watch checks process.kill(pid, 0) and
auto-deletes the heartbeat when the PID is no longer alive — no manual
cleanup needed after crashed/killed E2E runs.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
fix: fail fast on API connectivity — pre-check before E2E suite
Spawn a quick claude -p ping before running 13 tests. If the Anthropic API
is unreachable (ConnectionRefused), throw immediately instead of burning
through the entire suite with silent false passes.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
fix: never clean up observability artifacts — partial file persists after finalize
Removing the _partial-e2e.json deletion from finalize(). These are small files
on a local disk and their persistence is the whole point of observability.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
fix: detect is_error from claude -p result line (ConnectionRefused was PASS)
claude -p can return subtype="success" with is_error=true when the API is
unreachable. Previously we only checked subtype, so API failures silently
passed. Now check is_error first and report as 'error_api'.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
feat: eval-watch dashboard + observability unit tests (15 tests, 11 codepaths)
eval-watch: live terminal dashboard reads heartbeat + partial file every 1s,
shows completed/running tests, stale detection (>10min), --tail flag for
progress.log tail. Pure renderDashboard() function for testability.
observability.test.ts: unit tests for sanitizeTestName, heartbeat schema,
progress.log format, NDJSON file naming, savePartial() with _partial flag,
finalize() cleanup, diagnostic fields, watcher rendering, stale detection,
and non-fatal I/O guarantees.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
feat: wire runId + testName + diagnostics through all E2E tests
Generate per-session runId, pass testName + runId to every runSkillTest() call,
wire exit_reason/timeout_at_turn/last_tool_call through recordE2E(). Add
eval:watch script entry to package.json.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>