Upstream: Claude Code v2.1.304 Assessment

The issue lists upstream changes that may affect Sequant but does not specify which changes need implementation. Start by reviewing the linked Claude Code v2.1.304 release notes and the listed affected hook files: templates/hooks/pre-tool.sh, plugin/hooks/hooks.json, and templates/settings.json. Determine which actionable changes apply to Sequant, then document or implement the required updates and their verification.

Upstream: Claude Code v2.1.304 Assessment

Release: v2.1.304
Released: 2026-10-19
Assessed: 2026-10-23

Summary

Category	Count	Action Required
Breaking Changes	0	None
Name Collisions	0	None
Deprecations	2	Review needed
New Tools	2	Issue if it touches sequant
Hook Changes	3	Issue if it touches sequant
Opportunities	29	Noted for review
No Action	40	None

Actionable

Breaking changes, deprecations, and other items that affect sequant.

1. New tool: Added decider: "person" to a mod's tool.check answer: only the permission di...

Added decider: "person" to a mod's tool.check answer: only the permission dialog or a host's callback can approve the ask, and it is refused with the mod's reason where nobody can be asked

• Matched keywords: permission, ask, tool
• Matched patterns: newTool, permission
• Impact: low

2. New tool: Added e.isReadOnly to a mod's tool.check event, set when the tool call is re...

Added e.isReadOnly to a mod's tool.check event, set when the tool call is read-only

• Matched keywords: Read, tool
• Matched patterns: newTool
• Impact: low

3. Hook change: Fixed a PreToolUse hook's deny reason being replaced by a timeout error when an ...

Fixed a PreToolUse hook's deny reason being replaced by a timeout error when an Agent SDK callback hook on the same tool call timed out

• Matched keywords: hook, PreToolUse, deny, tool, agent
• Matched patterns: hook, permission
• Affected files: templates/hooks/pre-tool.sh, plugin/hooks/hooks.json, templates/settings.json
• Impact: medium

4. Hook change: Fixed a skill's once hook also removing another skill's identical hook after i...

Fixed a skill's once hook also removing another skill's identical hook after it ran

• Matched keywords: hook, skill
• Matched patterns: hook
• Impact: medium

5. Deprecated: Removed the notes from claude plugin validate that predicted where a mod's hoo...

Removed the notes from claude plugin validate that predicted where a mod's hooks would run

• Matched keywords: plugin
• Matched patterns: deprecation
• Impact: medium

6. Deprecated: Removed the "(research preview)" label from the /fast dialog title on Opus 5.5

Removed the "(research preview)" label from the /fast dialog title on Opus 5.5

• Matched patterns: deprecation
• Impact: medium

7. Hook change: [VSCode] Fixed one cause of sessions failing to start with "Subprocess initializ...

[VSCode] Fixed one cause of sessions failing to start with "Subprocess initialization did not complete within 60000ms": time a SessionStart command hook spends running no longer counts toward the limit, up to 10 minutes in total

• Matched keywords: hook
• Matched patterns: hook
• Impact: medium

Informational

Opportunities noted for human triage. No individual issues auto-created.

1. Added a transcript line when a plugin that runs first skips one of your mod's ho...

Added a transcript line when a plugin that runs first skips one of your mod's hooks, naming the event and the plugin

• Matched keywords: plugin
• Impact: low

2. Added /claude-api managed-agents-secure, which compares a Managed Agents agent...

Added /claude-api managed-agents-secure, which compares a Managed Agents agent's settings with Anthropic's published security guide, without changing anything

• Matched keywords: agent, settings
• Impact: low

3. Fixed the organization policy not refreshing until the hourly check after approv...

Fixed the organization policy not refreshing until the hourly check after approving an ANTHROPIC_API_KEY at startup or switching "Use custom API key" in /config

• Matched keywords: config
• Impact: low

4. Fixed sandboxed commands failing to start on Linux when a `sandbox.filesystem.de...

Fixed sandboxed commands failing to start on Linux when a sandbox.filesystem.denyRead glob contains brackets that are not a character class, such as a [user-id] route folder

• Matched keywords: Glob
• Impact: low

5. Fixed a plugin keeping a headless run going past --max-turns, Stop, or ended i...

Fixed a plugin keeping a headless run going past --max-turns, Stop, or ended input by spawning subagents or re-running a finished one

• Matched keywords: plugin
• Impact: low

6. Fixed mod sharing in the built-in plugin-authoring skill stopping at the secre...

Fixed mod sharing in the built-in plugin-authoring skill stopping at the secret scan on machines with managed settings and on Team and Enterprise plans

• Matched keywords: settings, plugin, skill
• Impact: low

7. Fixed scheduled Cowork cloud sessions waiting five minutes again for each subage...

Fixed scheduled Cowork cloud sessions waiting five minutes again for each subagent whose WebFetch needed a URL approval that nobody was there to give

• Matched keywords: subagent, WebFetch
• Impact: low

8. Fixed Write results and rejected edits showing a file outside the working direct...

Fixed Write results and rejected edits showing a file outside the working directory as ../../…; they now show ~/… or the full path

• Matched keywords: Write
• Impact: low

9. Fixed a claude.ai Directory plugin's skills not running as commands when picked ...

Fixed a claude.ai Directory plugin's skills not running as commands when picked from the "/" menu in Cowork cloud sessions

• Matched keywords: plugin
• Impact: low

10. Fixed unsandboxed Bash commands in Claude Desktop Code tab sessions on macOS and...

Fixed unsandboxed Bash commands in Claude Desktop Code tab sessions on macOS and Linux not seeing environment variables exported in shell startup files such as ~/.zshrc

• Matched keywords: Bash
• Impact: low

11. Fixed /privacy-settings offering choices that may not apply to you after a net...

Fixed /privacy-settings offering choices that may not apply to you after a network or server error

• Matched keywords: settings
• Impact: low

12. Fixed resumed and cloud sessions sending Claude the whole skill list again each ...

Fixed resumed and cloud sessions sending Claude the whole skill list again each time plugins reloaded at startup

• Matched keywords: skill
• Impact: low

13. Fixed an interrupt not ending a Read that waits on an idle pipe or device named ...

Fixed an interrupt not ending a Read that waits on an idle pipe or device named like an image

• Matched keywords: Read
• Impact: low

14. Fixed Bash and PowerShell deleting a large command's output file when it could n...

Fixed Bash and PowerShell deleting a large command's output file when it could not be copied to the session's tool-results folder, unless the disk is full

• Matched keywords: Bash, tool
• Impact: low

15. Fixed self-paced /loop wakeups scheduled at the 1-hour maximum firing just aft...

Fixed self-paced /loop wakeups scheduled at the 1-hour maximum firing just after the 1-hour prompt cache expired, so those wakeups no longer re-read the conversation uncached

• Matched keywords: Read
• Impact: low

16. Fixed agent teams: approving a shutdown request from the main session no longer ...

Fixed agent teams: approving a shutdown request from the main session no longer exits the whole CLI

• Matched keywords: agent
• Impact: low

17. Improved artifacts with several views: when you ask for links to them, Claude no...

Improved artifacts with several views: when you ask for links to them, Claude now writes out each view's link and explains that the address bar stays the same as you switch views

• Matched keywords: ask
• Matched patterns: permission
• Impact: low

18. Improved cloud sessions: a new conversation's first turn no longer waits for the...

Improved cloud sessions: a new conversation's first turn no longer waits for the local (stdio) MCP servers of plugins synced from claude.ai, unless a server sets alwaysLoad: true

• Matched keywords: MCP
• Matched patterns: mcp
• Impact: low

19. Improved the claude -p invalid-settings warning: a file that did not load list...

Improved the claude -p invalid-settings warning: a file that did not load lists only what stopped it, and long lists are capped per file

• Matched keywords: settings
• Impact: low

20. Self-hosted runner: Improved the error shown when the git host answers "not foun...

Self-hosted runner: Improved the error shown when the git host answers "not found" for a session's repository: it now names the repository and whom to ask

• Matched keywords: ask
• Matched patterns: permission
• Impact: low

21. Changed mods' settings.read hooks to receive each settings layer and rewrite t...

Changed mods' settings.read hooks to receive each settings layer and rewrite the merged settings, so a managed mod can make an organization's setting a ceiling, including the cleanupPeriodDays the retention sweep uses

• Matched keywords: Read, settings
• Impact: low

22. Changed tool search to be on by default behind a custom ANTHROPIC_BASE_URL; a ...

Changed tool search to be on by default behind a custom ANTHROPIC_BASE_URL; a 400 or 422 from the gateway is retried without it

• Matched keywords: tool
• Impact: low

23. Changed compaction to send Claude the skill list again afterwards; `/reload-skil...

Changed compaction to send Claude the skill list again afterwards; /reload-skills now sends only new or changed skills

• Matched keywords: skill
• Impact: low

24. Changed skill hooks: the skills of one source (a repo, your own folder, or a plu...

Changed skill hooks: the skills of one source (a repo, your own folder, or a plugin) can register at most 1,024 hooks and 16,384 matcher characters per session

• Matched keywords: plugin, skill
• Impact: low

25. Changed skills under a policy that allows hooks from plugins only: a skill used ...

Changed skills under a policy that allows hooks from plugins only: a skill used in the main conversation whose hooks are kept out no longer gets its allowed-tools

• Matched keywords: skill
• Matched patterns: permission
• Impact: low

26. Updated the /claude-api skill to use the ant CLI on Claude Platform on AWS ins...

Updated the /claude-api skill to use the ant CLI on Claude Platform on AWS instead of falling back to the SDK or curl

• Matched keywords: skill
• Impact: low

27. [VSCode] Changed background sub-agents to show as one status line under their Ag...

[VSCode] Changed background sub-agents to show as one status line under their Agent card instead of streaming every step into the chat; the full transcript stays in /tasks

• Matched keywords: background, agent
• Impact: low

28. [Claude Tag] Fixed Claude going silent in a thread when its channel becomes shar...

[Claude Tag] Fixed Claude going silent in a thread when its channel becomes shared across Enterprise Grid workspaces mid-task; it now posts a one-time note to @-mention it in a new thread

• Matched keywords: Task
• Impact: low

29. [Code Review] Added an option in Code Review admin settings to review every repo...

[Code Review] Added an option in Code Review admin settings to review every repository in a GitHub organization, including ones added later, without selecting them one by one

• Matched keywords: settings
• Impact: low

No Action Required

40 changes did not require action:

• Added /auto-mode-setup: a guided setup that reads your project and recent sessions to teach auto mode about your environment, now also available on Bedrock, Vertex, Foundry, Claude apps gateway and telemetry-disabled sessions
• Added the names of the tools called earlier to the compaction summary in the transcript view (Ctrl+O)
• Added a warning on Pro and Max plans when resuming an inactive conversation would use a noticeable share of your 5-hour usage limit: resume anyway, or start a new conversation and Claude can look up the previous one if you refer to it
• Fixed rm -r of a mounted drive or a folder at its top level (/Volumes, /media, WSL's /mnt/c) not getting the safety prompt that rm -rf /Applications gets
• Fixed CLAUDE_CODE_TRANSCRIPT_LOCAL_GC dropping messages from the saved transcript when the disk filled up while the file was being trimmed
• Fixed a failed mod reload removing the tools and commands of the version that stays loaded, and its messages being wrong or silent about whether the previous version is still loaded
• Fixed a click on a mod's button being lost when buttons with the same label and no key were redrawn unchanged
• Fixed Remote Control permanently withholding a desktop conversation's history when a different account was signed in to the terminal
• Fixed Remote Control failing to start from Claude Desktop when DISABLE_TELEMETRY or DO_NOT_TRACK is set on a paid plan
• Fixed model switches, messages and interrupts waiting behind a context usage check in SDK and desktop sessions
• Fixed context_management: Extra inputs are not permitted errors behind LLM gateways; Claude Code now resends the request without that field
• Fixed OpenTelemetry settings delivered through server-managed settings being ignored for the whole session after signing in during first-run setup or the first start after /logout
• Fixed the Consumer Terms notice being skipped for a day or longer after a server error
• Fixed a "Context limit reached" or "Prompt is too long" error after stopping a turn while Claude Code was compacting a conversation the API had rejected as too long
• Fixed subagents sometimes forgetting their most recent work when they were messaged or resumed right after finishing
• Fixed claude --help text for --tools, --resume, --debug, --json-schema, --disable-slash-commands, --system-prompt-snapshot and claude update to match actual behavior
• Fixed claude --worktree removing the worktree and its branch without asking at exit when HEAD was detached or on another branch, which could lose commits
• Fixed /effort status, /effort ultracode and the prompt's effort indicator showing a guessed effort level when CLAUDE_CODE_EFFORT_LEVEL is auto or unset and no level is sent
• Fixed notes typed into a multiple-choice question with previews being cut off with "…" in terminals under about 100 columns, hiding what was typed (anthropics/claude-code#82768)
• Fixed transcript mode's { and } landing the prompt on an inconsistent row, or off screen, instead of the transcript's first row
• Fixed CLAUDE_CODE_AUTO_COMPACT_WINDOW=200k silently setting a 100K window: the variable now accepts k and M suffixes like --autocompact, and warns when a value is out of range or ignored
• Fixed Ctrl+C in the agents view clearing a text selection without copying it when pressed before the mouse button was released
• Improved /usage to say when a rate limit on usage data ends instead of "try again in a moment"
• Improved the lines shown when a mod written in the session loads, reloads or fails to load
• Improved how a remote session recovers its status when the server refuses a status update that carried other session data
• Improved session file size in auto mode: the safety classifier's context is no longer stored with every request
• Improved resume of large compacted sessions in SDK and headless mode: the first request after resuming is sent sooner
• Improved responsiveness and throughput when many subagents are running at the same time
• Improved memory use when sending requests in long or resumed conversations
• Windows: Improved git command start-up with a standard Git for Windows install by running its git.exe directly instead of through its cmd launcher
• Changed the /artifacts delete confirmation to show numbered choices: 1 or Enter keeps the artifact, 2 deletes it, and y, n and Esc still work
• Changed the question that turns on the mods Claude writes in a session to plain text with no link or session id; it stays up when a new turn starts, and Claude tells you what loaded when you turn them on
• [VSCode] Added mod drawing in the chat panel for sessions on Amazon Bedrock, Google Vertex AI and Microsoft Foundry, behind an LLM gateway, or with telemetry turned off
• [VSCode] Fixed a session closed while it was starting keeping its Claude Code process running until the start ended
• [VSCode] Fixed a mod's drawings disappearing from a long-open panel until the next turn on machines that also run an older Claude Code
• [VSCode] Fixed Past conversations hiding sessions when claudeCode.claudeProcessWrapper is set
• [Cloud sessions] Fixed folders in the composer's @ list showing no name in cloud sessions, where picking one added only a space instead of a mention
• [Claude Tag] Fixed @Claude !fork typed outside a thread getting no visible reply; Claude now shows you a private note saying to run it from inside a thread
• [Code Review] Added review levels to Code Review: Owners choose Quick, Standard (the default), or Deep for the organization, and can give individual repositories their own level
• [Code Review] Fixed pull requests opened within a minute or two of an admin turning on Code Review being silently skipped; they are now retried and reviewed

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