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Claude Code Week 15 Release Digest (April 6–10, 2026)

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Source: Anthropic What’s New — Week 15 Type: Release Notes Releases: v2.1.92 → v2.1.101 Date Range: April 6–10, 2026

Four headline features, twelve smaller wins. Ultraplan ships cloud planning from the terminal. The new Monitor tool spawns background watchers that stream events into the conversation, replacing Bash sleep loops. /autofix-pr brings the Week-13 web auto-fix to the CLI. /team-onboarding packages your local Claude Code setup as a teammate ramp-up guide. Plus default effort high for API-key / Bedrock / Vertex / Foundry / Team / Enterprise users — a meaningful behavior shift for non-subscription tiers.

Headline features

Ultraplan (research preview)

Kick off plan mode in the cloud from your terminal, then review in your browser. Claude drafts the plan in a Claude Code on the web session while your terminal stays free; comment on individual sections, ask for revisions, choose to execute remotely or send back to the CLI. v2.1.101 auto-creates a default cloud env on first run — no web setup. See Ultraplan.

> /ultraplan migrate the auth service from sessions to JWTs

Monitor tool (v2.1.98)

A new built-in tool that spawns a background watcher and streams events into the conversation as new transcript messages — Claude reacts immediately. Tail a training run, babysit a PR’s CI, auto-fix a dev server crash the moment it happens. No Bash sleep loops holding the turn open.

> Tail server.log in the background and tell me the moment a 5xx shows up

Pairs with /loop, which now self-paces (omit interval → Claude picks each tick or reaches for Monitor instead of polling). See Scheduled Tasks for the full pairing.

> /loop check CI on my PR

/autofix-pr (CLI)

PR auto-fix landed on the web in Week 13. Now /autofix-pr enables it from the terminal — infers the open PR for your current branch, flips the toggle on Claude Code on the web in one step. Push, run, walk away; Claude watches CI + review comments and pushes fixes until green.

> /autofix-pr

/team-onboarding (v2.1.101)

Generates a teammate ramp-up guide from your local Claude Code usage. Run it in a project you know well; hand the output to a new teammate so they replay your setup instead of starting from defaults. Captures CLAUDE.md patterns, hook configurations, plugin installs, etc.

> /team-onboarding

Other wins

  • Focus view (Ctrl+O) in flicker-free mode — collapses the view to your last prompt, a one-line tool summary with diffstats, and Claude’s final response. Builds on Week 14’s alt-screen renderer.
  • Bedrock + Vertex login wizards on the login screen — pick “3rd-party platform” for step-by-step auth, region, credential check, and model pinning.
  • /agents tabbed layout — a Running tab shows live subagents with ● N running count; Run agent and View running instance actions in the Library tab.
  • Default effort raised to high for API-key, Bedrock, Vertex, Foundry, Team, and Enterprise users (Pro/Max subscriptions remain at xhigh). Control with /effort. See Opus 4.7 Best Practices.
  • /cost shows per-model and cache-hit breakdown for subscription users.
  • /release-notes is now an interactive version picker.
  • Status line: new refreshInterval setting re-runs the command every N seconds; workspace.git_worktree available in JSON input.
  • CLAUDE_CODE_PERFORCE_MODE — Edit/Write fail on read-only files with a p4 edit hint instead of silently overwriting.
  • OS CA certificate store trusted by default — enterprise TLS proxies work without extra setup. Opt out with CLAUDE_CODE_CERT_STORE=bundled.
  • Amazon Bedrock via Mantle — CLAUDE_CODE_USE_MANTLE=1.
  • Hardened Bash permissions — backslash-escaped flags, env-var prefixes, /dev/tcp redirects, and compound commands now prompt correctly. Closes prior parser bypass cases.
  • UserPromptSubmit hooks can set the session title via hookSpecificOutput.sessionTitle.

Key Takeaways

  • Two new “delegate to the cloud” patterns ship in one week: Ultraplan for planning, /autofix-pr for CI loop. Both run in Claude Code on the web while the terminal stays free.
  • The Monitor tool is the structural answer to “Claude is sitting in a Bash sleep loop” — it makes background watching a first-class tool with event-driven re-entry.
  • Default effort jump for non-subscription tiers is the most consequential silent change. Pre-W15: API-key/Bedrock/Vertex/Foundry/Team/Enterprise defaulted to medium or high depending on configuration. Post-W15: high. Pro/Max remain at xhigh. Audit cost dashboards.
  • Focus view + flicker-free renderer completes a two-week arc — opt-in renderer last week, opinionated reading view this week.
  • Enterprise polish wave: OS CA cert trust, Bedrock-via-Mantle, Perforce read-only awareness, Bedrock/Vertex setup wizards. The flag and env-var matrix is widening — see CLI reference.
  • UserPromptSubmit.sessionTitle is small but practical: programmatically rename sessions based on the first user message (instead of the auto-generated default).

Try It

  1. Run /ultraplan for a non-trivial migration. Compare the output to running the same prompt in local plan mode (Shift+Tab to plan).
  2. Replace one of your /loop 30s … sleeps with a Monitor tool invocation: “Watch dist/build.log for ‘compiled successfully’ and tell me when it lands.”
  3. After your next push, run /autofix-pr from the branch and let it run while you do something else.
  4. In a project you’ve spent real time in, run /team-onboarding and read the generated guide as if you were a new hire.
  5. If you’re on API-key / Bedrock / Vertex / Foundry / Team / Enterprise: re-baseline cost on a typical workload — default effort just shifted up.
  6. Add a UserPromptSubmit hook that sets hookSpecificOutput.sessionTitle to the first 60 chars of the user’s prompt for cleaner session resumption.
  • Week 13 (March 23–27) — Auto mode RP, Desktop computer use, PR auto-fix on web, transcript search, conditional hooks.
  • Week 14 (March 30 – April 3) — Computer use in CLI, /powerup, flicker-free renderer (the substrate for Ctrl+O), MCP per-tool result-size override, plugin bin/ directory.
  • Ultraplan — full coverage of the cloud-planning research preview.
  • Scheduled Tasks — Monitor tool + self-pacing /loop integration.
  • Hooks — UserPromptSubmit.sessionTitle.
  • Opus 4.7 Best Practices — default effort tier shift for non-subscription users.
  • CLI Reference — new env vars (CLAUDE_CODE_PERFORCE_MODE, CLAUDE_CODE_USE_MANTLE, CLAUDE_CODE_CERT_STORE).
  • Claude Code Routines — durable cloud delegation; sibling pattern to Ultraplan + /autofix-pr.
  • Claude Managed Agents — fully unattended cloud agents.

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