## What's changed
- Added `ENABLE_PROMPT_CACHING_1H` env var to opt into 1-hour prompt cache TTL on API key, Bedrock, Vertex, and Foundry (`ENABLE_PROMPT_CACHING_1H_BEDROCK` is deprecated but still honored), and `FORCE_PROMPT_CACHING_5M` to force 5-minute TTL
- Added recap feature to provide context when returning to a session, configurable in /config and manually invocable with /recap; force with `CLAUDE_CODE_ENABLE_AWAY_SUMMARY` if telemetry disabled.
- The model can now discover and invoke built-in slash commands like `/init`, `/review`, and `/security-review` via the Skill tool
- `/undo` is now an alias for `/rewind`
- Improved `/model` to warn before switching models mid-conversation, since the next response re-reads the full history uncached
- Improved `/resume` picker to default to sessions from the current directory; press `Ctrl+A` to show all projects
- Improved error messages: server rate limits are now distinguished from plan usage limits; 5xx/529 errors show a link to status.claude.com; unknown slash commands suggest the closest match
- Reduced memory footprint for file reads, edits, and syntax highlighting by loading language grammars on demand
- Added "verbose" indicator when viewing the detailed transcript (`Ctrl+O`)
- Added a warning at startup when prompt caching is disabled via `DISABLE_PROMPT_CACHING*` environment variables
- Fixed paste not working in the `/login` code prompt (regression in 2.1.105)
- Fixed subscribers who set `DISABLE_TELEMETRY` falling back to 5-minute prompt cache TTL instead of 1 hour
- Fixed Agent tool prompting for permission in auto mode when the safety classifier's transcript exceeded its context window
- Fixed Bash tool producing no output when `CLAUDE_ENV_FILE` (e.g. `~/.zprofile`) ends with a `#` comment line
- Fixed `claude --resume <session-id>` losing the session's custom name and color set via `/rename`
- Fixed session titles showing placeholder example text when the first message is a short greeting
- Fixed terminal escape codes appearing as garbage text in the prompt input after `--teleport`
- Fixed `/feedback` retry: pressing Enter to resubmit after a failure now works without first editing the description
- Fixed `--teleport` and `--resume <id>` precondition errors (e.g. dirty git tree, session not found) exiting silently instead of showing the error message
- Fixed Remote Control session titles set in the web UI being overwritten by auto-generated titles after the third message
- Fixed `--resume` truncating sessions when the transcript contained a self-referencing message
- Fixed transcript write failures (e.g., disk full) being silently dropped instead of being logged
- Fixed diacritical marks (accents, umlauts, cedillas) being dropped from responses when the `language` setting is configured
- Fixed policy-managed plugins never auto-updating when running from a different project than where they were first installed