Source Intelligence
Sweep 28 Aug 2026 · 16:06Z Build v2.1.251 479 read Stable v2.1.236 Latest v2.1.251 Next v2.1.251 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

Prompt capture

v2.1.251 system prompt

1 of 27 tool descriptions changed. The appended system-reminder blocks moved: 1 line added, 1 line removed. Compared against v2.1.250.

Agent SDK, print mode, seeded with flags-anon 27 model strings 27 tools released captured Markdown

This arm was captured with the sandbox seeded from flags-anon, the anonymous GrowthBook payload, seeded into the sandbox .claude.json. 566 flags from data/flags/snapshots/flags-20260828T161543Z.json. What a seeded capture does and does not tell you.

Bash, reached 1 of 27 arms +1 −1 of 16 lines

This edit reached 1 of 27 arms: default

from line 11
 - Use the `gh` CLI for GitHub operations (PRs, issues, API).
 - Commit or push only when the user asks. If on the default branch, branch first.
 - End git commit messages with:
-Co-Authored-By: Claude <[email protected]>
+Co-Authored-By: Claude Code <[email protected]>
 - End PR bodies with:
 🤖 Generated with [Claude Code](https://claude.com/claude-code)

Bash, reached 1 of 27 arms +2 −2 of 118 lines

This edit reached 1 of 27 arms: sonnet[1m]

from line 58
 3. Run the following commands in parallel:
    - Add relevant untracked files to the staging area.
    - Create the commit with a message ending with:
-   Co-Authored-By: Claude <[email protected]>
+   Co-Authored-By: Claude Code <[email protected]>
    - Run git status after the commit completes to verify success.
    Note: git status depends on the commit completing, so run it sequentially after the commit.
 4. If the commit fails due to pre-commit hook: fix the issue and create a NEW commit
from line 75
 git commit -m "$(cat <<'EOF'
    Commit message here.
 
-   Co-Authored-By: Claude <[email protected]>
+   Co-Authored-By: Claude Code <[email protected]>
    EOF
    )"
 </example>

The full text

The whole documents, one page each, exactly as they were sent.