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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
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attach

cli never mined JSON

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

Attaching to a background session now times how long it takes to paint and reach an idle prompt.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.221.

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 v2.1.128 first named in a changelog, 4 May 2026

In the changelogs

12

Releases whose published page names attach.

  1. v2.1.290
    claude attach and claude logs accept a session name

    claude attach and claude logs now take a session name as well as an id, and part of the name is enough

    named in this entry

  2. v2.1.285
    New --desktop flag, and background commands now accept options in front of them

    --desktop opens the Claude Desktop app and now errors when combined with background or worktree options

    found in this entry's text

  3. v2.1.285
    Resuming a running background session now opens it and sends your prompt

    --resume on a session running in the background now attaches to it and hands over your prompt instead of refusing

    named in this entry

  4. v2.1.285
    Resuming a session running in the background can now open it and deliver your prompt

    Resuming a session that runs in the background can now open it and send your prompt, instead of only refusing

    named in this entry

  5. v2.1.265
    New attach session-opener path with a serveOnly mode

    A new 'attach' session-opening path supports a reduced serveOnly feature set

    found in this entry's text

  6. v2.1.257
    New CLI messaging when resuming a session that's already running

    Resuming a session that is already running elsewhere starts a copy and points you to claude attach to join the live one.

    named in this entry

  7. v2.1.251
    Background session subcommands in CLI help

    CLI help now lists attach, logs, stop, respawn and rm for background sessions.

    found in this entry's text

  8. v2.1.248
    claude attach explains cleaned-up background sessions instead of failing generically

    Reopening a cleaned-up background session now points you at claude rm and claude respawn.

    named in this entry

  9. v2.1.247
    claude attach tells you whether the terminal host died or just never answered

    Attach failures now distinguish a dead terminal host from a silent session, and offer the right recovery.

    named in this entry

  10. v2.1.221
    claude attach now measures time-to-interactive

    Attaching to a background session now times how long it takes to paint and reach an idle prompt.

    named in this entry

  11. v2.1.196
    SendUserFile Display Mode

    found in this entry's text

  12. v2.1.128
    Background Session Recovery and Cleanup

    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 CLI flag does. All CLI flags.

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