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Sweep 28 Aug 2026 ยท 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 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.

System prompt ledger
Injected prompts

The prompts around the prompt.

The system array is one of several prompts Claude Code puts on the wire. This is the ledger of the others: the compaction instruction, a subagent request’s own system prompt, and the <system-reminder> blocks that only appear in some conversations.

The system prompt ledger covers the system array itself, release by release, and has done since v2.1.170.

Coverage: 18.1% strict · 23.3% granular · measured 2026-08-16 against v2.1.229

Subagents

Subagent prompt: explore, Subagent prompt: general-purpose, Subagent prompt: plan

v2.1.250to v2.1.250 3 releases, no change to these prompts. 27 Aug 2026
v2.1.250 No change to the system prompt since v2.1.248.
v2.1.250 No change to the system prompt since v2.1.248.
v2.1.250 No change to the system prompt since v2.1.248.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.

System reminders

System reminder: claude md, System reminder: hook pretool block, System reminder: read dup, System reminder: read empty, System reminder: read offset, System reminder: skill run

v2.1.250to v2.1.250 6 releases, no change to these prompts. 27 Aug 2026
v2.1.250 No change to the system prompt since v2.1.248.
v2.1.250 No change to the system prompt since v2.1.248.
v2.1.250 No change to the system prompt since v2.1.248.
v2.1.250 No change to the system prompt since v2.1.248.
v2.1.250 No change to the system prompt since v2.1.248.
v2.1.250 No change to the system prompt since v2.1.248.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.

Compaction

Compaction instruction

v2.1.250 No change to the system prompt since v2.1.248.
v2.1.248 First capture in the ledger, so there is nothing to compare it against yet.