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v2.1.199 Feature

This release adds 2 notable features for engineering teams evaluating rollout.

✓ No known CVEs patched
Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Affected surfaces

auth crypto_tls

Summary

AI summary

Transient server rate-limit (429) errors are automatically retried with backoff for subscribers and retry limits were increased.

Full changelog

What's changed

  • Stacked slash-skill invocations like /skill-a /skill-b do XYZ now load all leading skills (up to 5), not just the first
  • Fixed SSL certificate errors (TLS-inspecting proxies, missing NODE_EXTRA_CA_CERTS, expired certs) burning retries before showing actionable guidance — they now fail immediately with the fix hint
  • Fixed streaming responses being discarded when the API emits a mid-stream overloaded/server error after partial output — the partial is now kept with an incomplete-response notice
  • Fixed subagents cut off by a rate limit or server error silently failing instead of returning their partial work to the parent
  • Fixed subagents reporting API errors (e.g. usage limit reached) as successful results — the error is now reported to the parent agent
  • Fixed the background-agent daemon on Linux killing itself and every running agent every ~50 seconds after an unclean shutdown left a corrupted worker record
  • Fixed background agents failing to cold-start over SSH on macOS with "Could not switch to audit session" (regression in 2.1.196)
  • Fixed claude stop being silently undone when it raced a background-agent respawn — the respawn now honors the stop
  • Fixed background job progress indicators stalling for minutes while the job ran long commands
  • Fixed background sessions on memory-starved machines showing a generic error — they now indicate low memory and suggest freeing resources
  • Fixed remote sessions briefly flapping between Working and Idle in the agent view when a background agent completes
  • Fixed idle subagents vanishing from the agent panel while other subagents were still working; surplus idle agents now collapse into an expandable summary row
  • Fixed typing /model or /fast while viewing a subagent silently opening the lead's model picker — a notice now explains the command applies to the lead
  • Fixed SessionStart, Setup, and SubagentStart hooks silently hiding stderr when exiting with code 2 — the error is now shown in the transcript
  • Fixed claude --dangerously-skip-permissions daemon <subcommand> being treated as a chat prompt instead of running the subcommand
  • Fixed SendMessage silently misrouting when a re-spawned agent reuses a previous agent's name — the tool now detects the mismatch and asks the caller to retarget
  • Fixed opening or resuming a session with no new messages needlessly growing the transcript file
  • Fixed backgrounding a session with or /background dropping its /color from the agent view row
  • Fixed resetting a corrupted config file from the startup recovery dialog destroying it unrecoverably — it now backs up the file first
  • Fixed Claude in Chrome repeatedly opening the reconnect page when sessions run from different builds or config directories
  • Fixed plan mode not prompting for state-changing browser tool calls; read-only browser_batch calls are now correctly auto-allowed
  • Transient server rate-limit errors (429s unrelated to your usage limit) are now retried automatically with backoff for subscribers instead of failing the turn
  • CLAUDE_CODE_RETRY_WATCHDOG now raises the default retry count for non-capacity transient errors to 300 and lifts the cap of 15 on CLAUDE_CODE_MAX_RETRIES
  • claude agents session rows now show pull-request links as bare #N without the redundant "PR" label

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Related context

Earlier breaking changes

  • v2.1.215 Claude no longer automatically runs /verify and /code-review skills
  • v2.1.160 Renames dynamic‑workflow trigger keyword from `workflow` to `ultracode`; `workflow` no longer triggers a run
  • v2.1.160 Deprecates and removes the `CLAUDE_CODE_OPUS_4_6_FAST_MODE_OVERRIDE` environment variable; it is now a no‑op
  • v2.1.147 Renames /simplify to /code-review; removes cleanup-and-fix behavior.

Beta — feedback welcome: [email protected]