chore(concepts-changelog): log v2.1.159 run (no drift, badge bump only)

v2.1.159 contains internal infrastructure improvements with no user-facing
changes. All findings are RECURRING INVALID or below confidence threshold.
Mandatory changelog entry appended with full verification log.

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

https://claude.ai/code/session_01C9BfAzRXgBFUeN1NHuXULT

changelog/best-practice/concepts/changelog.md

@@ -588,3 +588,20 @@ Tracks drift between the README CONCEPTS table and official Claude Code document
 | 9 | LOW | Verification | Local badge/link target files validated via filesystem check — `best-practice/`, `implementation/`, `reports/` targets exist; `implementation/claude-tasks-implementation.md` is **absent**, so concepts-agent's "add Tasks Implemented badge" suggestion is not actionable (no file to link) | ✅ COMPLETE (no missing local files among linked targets; Tasks-badge suggestion INVALID for lack of target) |
 | 10 | LOW | Verification | Command rename scan (rule #9) — changelog top 10 shows no NEW renames affecting Location-column command names; `/code-review`,`/batch` in Bundled Skills row still accurate; `/deep-research` is a new bundled workflow command surfaced under the proposed Dynamic Workflows row | ✅ COMPLETE (no rename drift; `/reload-skills` v2.1.152 is a new command, not a rename) |
 | 11 | LOW | Verification | claude-code-guide cross-check — independent 99-concept sweep corroborated Dynamic Workflows (v2.1.154), Opus 4.8, Ultracode; re-surfaced platform surfaces (RECURRING INVALID); flagged a docs/changelog lag — changelog 2.1.158 says auto mode reached Bedrock/Vertex/Foundry while `/en/permission-modes` still reads "Anthropic API only" (not CONCEPTS-actionable; Auto Mode row makes no provider claim) | ✅ COMPLETE (agents aligned on the NEW finding; lag noted, no action) |
+
+---
+
+## [2026-06-01 09:40 AM PKT] Claude Code v2.1.159
+
+| # | Priority | Type | Action | Status |
+|---|----------|------|--------|--------|
+| 1 | HIGH | Stale URL (recurring) | Commands URL `/slash-commands` not in official sitemap — redirects to `/skills`; canonical commands reference is `/en/commands` | ❌ INVALID (RECURRING from 2026-03-10; URL still resolves via redirect; user has chosen to keep as-is across 26+ runs) |
+| 2 | MED | Missing Concept (recurring) | Dedicated + claude-code-guide agents re-flagged Sessions, IDE Integration, Desktop App, Output Styles, Permissions, Sandboxing, Headless Mode, Context Window, .claude Directory as missing standalone rows | ❌ INVALID (RECURRING from 2026-03-10/03-17/04-08/05-01/05-12/05-21/05-25/06-01; user considers all platform/runtime surfaces or covered as Settings/Memory sub-links — not standalone concepts) |
+| 3 | MED | Missing Concept (recurring) | claude-code-guide flagged Prompt Library (`/en/prompt-library`) as missing concept | ❌ INVALID (reference/utility page with copy-paste prompts, not a feature/concept — consistent with user's pattern of rejecting non-feature docs pages like Glossary, Troubleshooting) |
+| 4 | LOW | Location Accuracy (NEW) | Concepts-agent questioned Dynamic Workflows Location `/effort ultracode` and `.claude/workflows/` at 0.65 confidence — neither term appears in official `/en/workflows` docs body | ✋ ON HOLD (below 0.7 confidence threshold; `/effort ultracode` may be an alias not yet documented; deferring to next run for re-evaluation) |
+| 5 | LOW | Verification | Latest version confirmed v2.1.159 via raw CHANGELOG.md — "Internal infrastructure improvements (no user-facing changes)"; nothing CONCEPTS-worthy | ✅ COMPLETE (version verified; badge bumped v2.1.158 → v2.1.159 in Phase 2.6) |
+| 6 | LOW | Verification | All 40+ external CONCEPTS URLs validated live by dedicated agent — only recurring `/slash-commands` redirect flagged; all other URLs return expected canonical pages including anchors (`#organize-rules-with-clauderules`, `#eliminate-prompts-with-auto-mode`, `#bundled-skills`, `#track-a-running-review`, `#run-a-bundled-workflow`, `#let-claude-use-your-computer`) | ✅ COMPLETE (no NEW broken URLs) |
+| 7 | LOW | Verification | All 22+ local badge/link target files validated — `best-practice/`, `implementation/`, `reports/`, `.claude/`, `.mcp.json`, `CLAUDE.md`, `orchestration-workflow/` targets all exist | ✅ COMPLETE (no missing local files) |
+| 8 | LOW | Verification | Beta Badge Currency (rule #7) — Auto Mode (`/en/permission-modes` `<Warning>`: "research preview"), Dynamic Workflows (`/en/workflows` `<Note>`: "research preview"), Fast Mode, Channels, Computer Use, Code Review, Chrome, Agent Teams, Agent View, Ultrareview, Ultraplan, No Flicker Mode, Routines, Voice Dictation — all confirmed research preview banners on their respective docs pages | ✅ COMPLETE (all README beta badges accurate; no demotions warranted) |
+| 9 | LOW | Verification | Command rename scan (rule #9) — v2.1.159 changelog contains no command/skill renames; `/code-review`, `/batch` in Bundled Skills row remain accurate | ✅ COMPLETE (no rename drift) |
+| 10 | LOW | Verification | claude-code-guide cross-check — independent 100-concept sweep corroborated all existing CONCEPTS coverage; re-surfaced platform/runtime surfaces and Prompt Library (both RECURRING INVALID per user policy); no contradictions with dedicated agent findings | ✅ COMPLETE (agents aligned; no NEW actionable findings) |