Bumps tutorial coverage from the v2.1.217 baseline (2026-07-22 sync) to
v2.1.220 — three contiguous releases (v2.1.218–v2.1.220).
Critical fixes:
- Nested subagent spawning is on by default again at depth 3 (v2.1.219).
Five locations across 04-subagents, CATALOG, 10-cli and QUICK_REFERENCE
stated it was disabled by default — true for v2.1.217–v2.1.218 only.
CLAUDE_CODE_MAX_SUBAGENT_SPAWN_DEPTH=1 now disables rather than enables.
All five carry an identical three-era history note.
- Claude Opus 5 is the default Opus model (v2.1.219). 10-cli asserted
"Opus 4.8 remains the default"; Opus 5 was absent from every model table.
Added to both model tables, 19 Compatible Models footers, and ~20
effort-level enumerations.
Also fixed: fast-mode model list, auto-mode eligibility self-contradiction
in 09-advanced-features, stale CLAUDE_CODE_ENABLE_AUTO_MODE opt-in in
CATALOG, hook-event count disagreement (29/30 -> 31 across three files),
doc-generator skill name/directory mismatch, stale "May 2026" headings,
and the last three docs.anthropic.com links.
Added: DirectoryAdded hook, /deep-research explicit-invocation note,
/code-review background subagent, context:fork background default, agent
frontmatter hook workspace trust, dynamic workflow size guideline and
workflowSizeGuideline key, sandbox.network.strictAllowlist, MCP error
surfacing, stream-json nested subagent forwarding, frontmatter boolean
values, agent name ':' rejection, auto/plan-mode classifier changes, and
Opus 5 safety-classifier fallback.
Renamed the deep-research skill example to topic-research to stop it
shadowing the built-in; mirrored to vi/ja/uk. doc-generator rename
mirrored to ja/zh/uk.
* docs: sync to Claude Code v2.1.212
Bumps tutorial coverage from the v2.1.206 baseline (2026-07-11 sync) to
v2.1.212, plus a repo-internal accuracy audit that surfaced defects
independent of the version delta.
Fixed:
- Dead `#` memory-shortcut removed from 02-memory/README.md (two places
documented a discontinued quick-memory-add pattern as working, directly
contradicting the file's own commands table)
- Auto mode opt-in -> opt-out on Bedrock/Vertex/Foundry (v2.1.207)
- `auto` permission mode mislabeled "Research Preview" across
09-advanced-features/README.md, CATALOG.md, README.md, and the vi/ja/zh/uk
translations (auto mode is GA, gated only by plan/model/provider)
- `/fork` / `/branch` history corrected: they were a single aliased command
only from v2.1.77 to v2.1.161, not "renamed" as previously stated
- `effort` frontmatter enum in 04-subagents/README.md completed with `xhigh`
- Bundled-skills count reconciled in CATALOG.md (9 -> 10)
- INDEX.md Skills section count and Feature Coverage Matrix Total column
fully recomputed and reconciled (Skills: 22, Plugins: 39)
- Stale 2.1.160 footer cluster (5 files) bumped to 2.1.212
- QUICK_REFERENCE.md fully resynced (was 52 versions behind)
- 02-memory/README.md's Memory Hierarchy section rewritten: replaced a
fabricated 8-tier strict-precedence model with the verified structure
(CLAUDE.md files are concatenated into context, not overridden; 4 real
location tiers; rules and auto memory are separate mechanisms)
- 02-memory/README.md's Memory Architecture diagram no longer conflates
claude.ai's 24h synthesis cycle with Claude Code's continuous auto memory
- Import recursion depth corrected (was documented as 5, actually 4 hops)
Added:
- Subagent output scanning (v2.1.210) documented in 04-subagents/README.md
- Session-wide spawn caps (v2.1.212): WebSearch and subagent limits
- MCP long-running-tool auto-backgrounding (v2.1.212) in 05-mcp/README.md
- `claude auto-mode reset` and `/resume` picker (v2.1.212)
- Screen reader mode (v2.1.208): --ax-screen-reader / CLAUDE_AX_SCREEN_READER
- Task tool `mode` parameter deprecation note (v2.1.212)
Known gaps (deferred, not fixed this pass):
- 03-skills/blog-draft/ vs 03-skills/.claude/skills/blog-draft/: confirmed
the latter is gitignored local testing scratch, not a repo duplicate
* fix(INDEX): correct Skills row arithmetic and stale changelog notes
INDEX.md's Skills header/matrix shipped as 22 (5+9+8) despite the PR's
own CHANGELOG claiming it was fixed to 21 — three independent counts
(file-type breakdown, filesystem listing, changelog intent) agree on
21; the Docs column was off by one. Also removes two stale CHANGELOG
"Known gaps" entries this same PR already resolved (memory hierarchy
rewrite, blog-draft gitignore confirmation) and adds the missing
Fixed-section bullet documenting the memory hierarchy rewrite.
* docs: sync to Claude Code v2.1.156 and Claude Opus 4.8
Model bump Opus 4.7 -> Opus 4.8 and version sync v2.1.150 -> v2.1.156.
- Rewrite effort-ladder claims for Opus 4.8 (default `high`; `xhigh` on
4.8/4.7; `max` on 4.8/4.7/4.6 and Sonnet 4.6; Haiku has no effort).
- Replace soon-removed CLAUDE_CODE_OPUS_4_6_FAST_MODE_OVERRIDE with the
`/model claude-opus-4-6[1m]` + `/fast on` path; note Opus 4.8 fast mode.
- Bump lineup tables to Opus 4.8; fix Haiku 4.5 context (1M -> 200K).
- Sweep Compatible Models + version/date footers to 2.1.156 / May 29, 2026
across 23 English docs (incl. 2.1.138/2.1.145 stragglers).
- Re-document `/simplify` as a distinct cleanup-only command (v2.1.154).
- Add Dynamic Workflows + `/workflows`, MessageDisplay hook (count 29->30),
disallowed-tools frontmatter, `/reload-skills` + SessionStart outputs,
`/model` default-save inversion, lean system prompt, status-line
COLUMNS/LINES, and the ultracode `/effort` note.
* docs(cli): drop unverified fast-mode dollar pricing, keep verified rate/speed multipliers
Sync covers v2.1.128, v2.1.129, and v2.1.131 (May 2026). Highlights:
gateway /v1/models discovery is now opt-in (CLAUDE_CODE_ENABLE_GATEWAY_MODEL_DISCOVERY),
added --plugin-url flag, disableRemoteControl setting, /mcp tool-count display,
expanded skillOverrides values, /context viz no longer leaks into conversation,
Ctrl+R cross-project default. Also reconciles slash-command count to 60+ and
fixes the skill-count entry in CATALOG.
Update 23 files across all 10 tutorial directories and 7 reference
documents to match the latest Claude Code v2.1+ features and correct
outdated content including model names (4.5→4.6), permission modes,
hook events, CLI syntax, MCP config paths, plugin manifest format,
checkpoint commands, session management, and URLs. Add documentation
for new features: Auto Memory, Remote Control, Web Sessions, Desktop
App, Agent Teams, MCP OAuth, Task List, Sandboxing, and more.
- Update all main markdown files (INDEX.md, LEARNING-ROADMAP.md, QUICK_REFERENCE.md, CONTRIBUTING.md, claude_concepts_guide.md, resources.md) with new responsive picture element
- Add logo to all subdirectory README files in feature folders (01-10) and plugins
- Replace old markdown image syntax with HTML picture element for dark/light mode adaptation
- Logo automatically displays dark mode version when system prefers dark mode
- Maintain correct relative paths for all nesting levels (../, ../../, etc.)
- Update README.md with new logo syntax
All markdown files now use the new V2.0 starburst logo design with professional dark/light mode support.
Luong NGUYEN