One read of Claude Code CLIclaude-code-20261021T053701Z
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### Only a teammate can approve a shutdown request
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315315| `Failed to write to <name>'s inbox — nothing was sent` | [Tool errors](#failed-to-write-to-a-teammate-inbox) |
316316| `Failed to write the plan approval request to the lead's inbox — plan not submitted` | [Tool errors](#failed-to-write-to-a-teammate-inbox) |
317317| `Its agent definition was not restored: the folder its definition file came from is not trusted` | [Tool errors](#teammate-agent-definition-not-restored) |
318| `Only a teammate can approve a shutdown request` | [Tool errors](#only-a-teammate-can-approve-a-shutdown-request) |
318319| `Message too large for cross-session delivery` | [Tool errors](#message-too-large-for-cross-session-delivery) |
319320| `Too many messages to this session just now` | [Tool errors](#too-many-messages-to-this-session-just-now) |
320321| `Cross-session message was dropped at the recipient session's inbox` | [Tool errors](#cross-session-message-dropped-at-the-inbox) |
from line 411
410411| `allows any option at its * · use an exact value` | [Configuration warnings](#has-a-wildcard-before-the-rest-of-the-command) |
411412| `Denying Bash also turns off the PowerShell tool, so Claude has neither` | [Configuration warnings](#denying-bash-also-turns-off-the-powershell-tool) |
412413| `CLAUDE_CODE_DISABLE_1M_CONTEXT is set, but the 200K limit isn't enforced` | [Configuration warnings](#the-200k-limit-isnt-enforced) |
414| `CLAUDE_CODE_AUTO_COMPACT_WINDOW="<value>" reads as <N> tokens, so Claude Code treats it as the 100k minimum` | [Values and warnings for `CLAUDE_CODE_AUTO_COMPACT_WINDOW`](/docs/en/model-config#claude_code_auto_compact_window-values) |
415| `CLAUDE_CODE_AUTO_COMPACT_WINDOW="<value>" is too large, so Claude Code treats it as the 1M maximum` | [Values and warnings for `CLAUDE_CODE_AUTO_COMPACT_WINDOW`](/docs/en/model-config#claude_code_auto_compact_window-values) |
416| `CLAUDE_CODE_AUTO_COMPACT_WINDOW="<value>" isn't a usable size, so Claude Code ignores it` | [Values and warnings for `CLAUDE_CODE_AUTO_COMPACT_WINDOW`](/docs/en/model-config#claude_code_auto_compact_window-values) |
413417| `Model "<model>" isn't recognized · context assumed to be 200k tokens` | [Correct the window for a gateway or custom model ID](/docs/en/model-config#correct-the-window-for-a-gateway-or-custom-model-id) |
414418| `Claude Code doesn't recognize the model "<model>", so it assumes a context window of 200k tokens` | [Correct the window for a gateway or custom model ID](/docs/en/model-config#correct-the-window-for-a-gateway-or-custom-model-id) |
415419| `[claude-code:unrecognized_model]` | [Configuration warnings](#unrecognized-model-id-on-a-request) |
from line 507
503507
504508* Check [status.claude.com](https://status.claude.com), or the provider status page named in the message, for active incidents
505509* Wait a minute, then send your message again. Your original message is still in the conversation, so for a long prompt you can type `try again` instead of pasting the whole thing.
510* If [`ANTHROPIC_BASE_URL`](/docs/en/env-vars) points at an [LLM gateway](/docs/en/llm-gateway) and every request fails this way, check whether your gateway is rejecting the tool search fields Claude Code sends by default. To check, set `ENABLE_TOOL_SEARCH=false` as [Tool search through an LLM gateway](/docs/en/mcp#tool-search-through-a-gateway) describes, then try again. Before v2.1.304, tool search was off behind a gateway unless you turned it on with `ENABLE_TOOL_SEARCH`.
506511* If the error persists with no posted incident, run `/feedback` so Anthropic can investigate with your request details. See [Report an error](#report-an-error) if `/feedback` is unavailable in your environment.
507512
508513### API Error: Repeated 529 Overloaded errors
from line 1288
12831288* If `/status` shows only your login, run `/login` once. If the credential was revoked, a fresh login replaces it.
12841289* If the same message returns for the same login account, the account or organization is no longer active. Check the account and organization that `/status` reports, and ask your organization admin to restore access.
12851290* If [`ANTHROPIC_BASE_URL`](/docs/en/env-vars) points at an [LLM gateway](/docs/en/llm-gateway), the text after `401` is your gateway's message rather than Anthropic's, and `/login` doesn't change it. Fix the credential your gateway expects instead.
1291* If every request fails with a `401` once your gateway has the credential it expects, check whether the gateway is rejecting the tool search fields Claude Code sends by default. To check, set `ENABLE_TOOL_SEARCH=false` as [Tool search through an LLM gateway](/docs/en/mcp#tool-search-through-a-gateway) describes, then try again. Before v2.1.304, tool search was off behind a gateway unless you turned it on with `ENABLE_TOOL_SEARCH`.
12861292
12871293### Login expired
12881294
from line 1854
18481854* Confirm you can reach the API host from the same shell by running `curl -I https://api.anthropic.com`. On Windows PowerShell use `curl.exe -I https://api.anthropic.com` so the built-in `Invoke-WebRequest` alias is not used.
18491855* If you are behind a corporate proxy, set `HTTPS_PROXY` before launching Claude Code and see [Network configuration](/docs/en/network-config)
18501856* If you route through an LLM gateway or relay, set [`ANTHROPIC_BASE_URL`](/docs/en/env-vars) to its address. See [Connect Claude Code to an LLM gateway](/docs/en/llm-gateway-connect) for setup.
1857* If `ANTHROPIC_BASE_URL` already points at your gateway and every request ends in `Connection dropped`, check whether your gateway is rejecting the tool search fields Claude Code sends by default. To check, set `ENABLE_TOOL_SEARCH=false` as [Tool search through an LLM gateway](/docs/en/mcp#tool-search-through-a-gateway) describes, then try again. Before v2.1.304, tool search was off behind a gateway unless you turned it on with `ENABLE_TOOL_SEARCH`.
18511858* Ensure your firewall allows the hosts listed in [Network access requirements](/docs/en/network-config#network-access-requirements)
1852* Intermittent failures are [retried automatically](#automatic-retries); persistent failures point to a local network issue
1859* Intermittent failures are [retried automatically](#automatic-retries)
18531860
18541861If `curl` succeeds but Claude Code still fails, the cause is usually something between the runtime and the network rather than the network itself:
18551862
from line 2209
22022209* Trim large `CLAUDE.md` memory files, or move instructions into [path-scoped rules](/docs/en/memory#path-specific-rules) that load only when relevant
22032210* Auto-compact is on by default and normally prevents this error. If you turned it off in `/config` or with [`DISABLE_AUTO_COMPACT`](/docs/en/env-vars), turn it back on. If you keep it off, run `/compact` yourself before the window fills.
22042211* If the error appears near 200K tokens on a model that accepts more, one cause is a model ID that Claude Code doesn't recognize. Claude Code assumes a 200K window for such an ID, so to keep working past that point, [give it the model's real context window](/docs/en/model-config#correct-the-window-for-a-gateway-or-custom-model-id).
2212* If the error appeared right after you stopped Claude while it was compacting the conversation, your conversation is unchanged and still large enough to need compacting. Run `/compact` and send your message again. To keep the error from recurring, [update Claude Code](/docs/en/setup#update-claude-code) to v2.1.304 or later. Before v2.1.304, stopping at that moment could end the turn with this error.
22052213
22062214See [Explore the context window](/docs/en/context-window) for an interactive view of how context fills up.
22072215
from line 2434
24262434* Use an alias such as `sonnet` or `opus` instead of a full versioned ID. Aliases resolve to a maintained default so they don't go stale. See [Model configuration](/docs/en/model-config).
24272435* If the wrong model keeps coming back in the CLI, a stale ID is set somewhere. Check the places you can set a model in [priority order](/docs/en/model-config#setting-your-model) and remove the stale value.
24282436* Claude Code reports an expired claude.ai login as [Login expired](#login-expired), not as this error. Before v2.1.206, an expired login that could no longer be refreshed failed every model with this error; run `/login` if you see that on an older version.
2437* If [`ANTHROPIC_BASE_URL`](/docs/en/env-vars) points at an [LLM gateway](/docs/en/llm-gateway) and every model fails this way, check whether your gateway is rejecting the tool search fields Claude Code sends by default. To check, set `ENABLE_TOOL_SEARCH=false` as [Tool search through an LLM gateway](/docs/en/mcp#tool-search-through-a-gateway) describes, then try again. Before v2.1.304, tool search was off behind a gateway unless you turned it on with `ENABLE_TOOL_SEARCH`.
24292438* For Google Cloud's Agent Platform deployments, see [Google Cloud's Agent Platform troubleshooting](/docs/en/google-vertex-ai#troubleshooting).
24302439
24312440### Model is not a recognized model id
from line 2623
26142623The reason after the file path says what failed:
26152624
26162625* **`can't be written (<code>)`**: the write failed with the operating system error code in parentheses, such as `EROFS` when the file, or the file it links to, sits on a filesystem that refuses writes. Make the file writable and switch again. If another tool generates the file, set the `model` key in that tool instead; see [A change you made in Claude Code is lost in new sessions](/docs/en/settings#a-change-you-made-in-claude-code-is-lost-in-new-sessions).
2617* **`isn't valid JSON`**: the file on disk doesn't parse, and Claude Code leaves it untouched rather than overwrite content it can't read back. Fix the syntax error, then switch again; see [Fix a broken settings file](/docs/en/settings#fix-a-broken-settings-file).
2618
2619A notice ending `couldn't confirm it was saved as your default (~/.claude/settings.json is still being written)` means the write hadn't finished after three seconds. It continues in the background, so the default may still be saved; check which model your next session starts on, or run `/model <name>` again.
2620
2621Before v2.1.265, the notice said the model was `saved as your default for new sessions` even when the write failed.
2622
2623### Advisor is less capable than the current main model
2624
2625Your [advisor model](/docs/en/advisor) ranks below your session's main model, so Claude Code keeps the selection but doesn't attach the advisor to the main model's requests.
2626
2627```text theme={null}
2628Advisor set to Opus 4.8
2629Note: Opus 4.8 is less capable than the current main model (Sonnet 5.5), so the advisor will not activate. Choose a more capable advisor, or switch to a smaller main model.
2630```
2631
2632Other messages report the same condition:
2633
2634* In an interactive session, a notification reads `Advisor will not activate on the main model (advisor is less capable); subagents may still use it and may use more tokens · /advisor`.
2635* When you launch with the `--advisor` flag in [non-interactive mode](/docs/en/headless), and the run isn't a [background session](/docs/en/agent-view), a warning goes to stderr and the run starts anyway. It reads `"<advisor>" cannot advise "<main model>" (the advisor must be at least as capable as the main model). The advisor will not be used for the main model.` An interactive session writes that warning only to the [debug log](#configuration-warnings).
2636
2637**What to do:**
2638
2639* Choose a higher-ranked advisor or a lower-ranked main model. [Choose an advisor model](/docs/en/advisor#choose-an-advisor-model) shows the ranking and lists the accepted advisors for each main model.
2640* Leave the advisor set if you want [subagents](/docs/en/sub-agents) whose model it can advise to keep using it
2641
2642Before v2.1.287, Claude Code ranked several pairings differently. It showed this note for a Sonnet 5.5 advisor with an Opus 4.7 or Opus 4.8 main model, a pairing it now accepts. It also attached some advisors that now produce this note, such as an Opus 4.8 advisor with a Sonnet 5.5 main model.
2643
2644### thinking.type.enabled is not supported for this model
2645
2646Your Claude Code version is older than the minimum for the selected model. The CLI sent a thinking configuration the model no longer accepts.
2647
2648```text theme={null}
2649API Error: 400 ... "thinking.type.enabled" is not supported for this model. Use "thinking.type.adaptive" and "output_config.effort" to control thinking behavior.
2650```
2651
2652**What to do:**
2653
2654* Run `claude update` and restart Claude Code. Opus 4.7 needs v2.1.111 or later. Opus 4.8 needs v2.1.154 or later. Sonnet 5 needs v2.1.197 or later. Opus 5 needs v2.1.219 or later. Opus 5.5 needs v2.1.280 or later. Sonnet 5.5 n
2626* **`isn't valid JSON`**: the file on disk doesn't parse, and Claude Code leaves it untouched rat