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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
Home / Reference / Settings keys

capabilities

setting never mined JSON

A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

Sessions now advertise a capability string so clients can detect queue-cancelling interrupts without version checks.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.219.

First seen — never in a mined build
Last seen — never in a mined build
Builds0 / 149on this box, as of v2.1.308
Written about v2.1.196 first named in a changelog, 29 Jun 2026

In the changelogs

20

Releases whose published page names capabilities.

  1. v2.1.285
    Programs connecting to Claude Code can learn its capabilities right away

    The reply to a program's opening connection can now list the capabilities already known at that point, so it need not wait for the first turn

    found in this entry's text

  2. v2.1.280
    Artifact deploy capability_refused errors now aggregate and truncate multiple entries

    Capability-refused errors during artifact deploy now get summarized and truncated instead of shown raw

    found in this entry's text

  3. v2.1.273
    Artifact publish gains an 'outside writer' role alongside 'cowritten'

    Artifacts gain a new 'outside writer' role separate from 'cowritten'

    found in this entry's text

  4. v2.1.271
    Artifact type description telemetry gains a 'declaration' / malformed-capabilities distinction

    Artifact-type telemetry now distinguishes a proper capabilities declaration from a missing or malformed one

    found in this entry's text

  5. v2.1.271
    Artifact publish now refuses to silently carry forward local-server capabilities beyond this computer's grant

    Publishing an artifact now blocks if it would silently carry over local-server capabilities beyond this computer's grant

    found in this entry's text

  6. v2.1.269
    Artifact tool schema gains read_page_data, capabilities/contract, and typed-Artifact catalog fields

    Artifact tool schema adds a read_page_data action plus capabilities, contract, and typed-catalog fields

    found in this entry's text

  7. v2.1.268
    Model catalog schema gains effort-level, family, and image-limit metadata

    Model catalog metadata now also includes image size limits alongside its existing effort and family fields

    found in this entry's text

  8. v2.1.267
    Artifact create-from-type now also rejects a deadline field

    Creating an Artifact from a type_url now also rejects a stray deadline field

    found in this entry's text

  9. v2.1.257
    Model info schema expanded with effort/capability metadata fields

    The model description schema now carries effort levels, capabilities, family, knowledge cutoff and per-family defaults.

    found in this entry's text

  10. v2.1.242
    /plugin validate inspects hooks modules instead of a declared capabilities list

    Plugin validation now loads your hooks modules and reports what they hook; the capabilities field is ignored.

    found in this entry's text

  11. v2.1.238
    A /design command that drafts a design on a canvas artifact

    A /design command that drafts a design on a canvas artifact now registers by default, if your account allows it.

    found in this entry's text

  12. v2.1.236
    Artifact types (templates and starters), built end to end and off by default

    You could start a private artifact from a published template, but two server switches keep it shut here.

    found in this entry's text

  13. v2.1.232
    The artifact self-update permission is now called artifact

    Self-updating artifact pages now declare an artifact capability, though the old self spelling still works.

    named in this entry

  14. v2.1.221
    ListMcpResources works against cached servers and connects on demand

    Listing MCP resources now includes cached servers, connecting them on demand instead of skipping them.

    found in this entry's text

  15. v2.1.219
    New protocol capability interrupt_cancel_queued_v1 on system/init

    Sessions now advertise a capability string so clients can detect queue-cancelling interrupts without version checks.

    found in this entry's text

  16. v2.1.219
    Workshop skill gains a direct-HTML authoring lane, and it is now the default

    The workshop skill would now write HTML documents by default, with a strict publish check, but isn't offered.

    found in this entry's text

  17. v2.1.219
    The workshop skill moved from hard-disabled to flag-gated

    The workshop skill went from permanently off to flag-gated, so remote config could switch it on.

    found in this entry's text

  18. v2.1.209
    Artifact Runtime Capabilities (MCP)

    found in this entry's text

  19. v2.1.209
    Capabilities Display in Tool Listings

    found in this entry's text

  20. v2.1.196
    Model Catalog Refactoring

    found in this entry's text

First cited

0

No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.

Presence across releases

0

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the settings key does. All settings keys.

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