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Clarify that cut point is always user/assistant/bash, never tool result

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Mario Zechner 2025-12-24 12:55:15 +01:00
parent 5f41a384cc
commit 35a40b2197
1 changed files with 7 additions and 7 deletions
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14
packages/coding-agent/docs/hooks.md
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@ -209,7 +209,7 @@ After compaction (new entry appended):
on reload on reload (stored in this entry)
```
The session file is append-only. When loading, the session loader finds the latest compaction entry, uses its summary, then loads messages starting from `firstKeptEntryIndex`.
The session file is append-only. When loading, the session loader finds the latest compaction entry, uses its summary, then loads messages starting from `firstKeptEntryIndex`. The cut point is always a user, assistant, or bashExecution message (never a tool result, which must stay with its tool call).
```
What gets sent to the LLM as context:
@ -222,7 +222,7 @@ What gets sent to the LLM as context:
summary firstKeptEntryIndex onwards
```
**Split turns:** When a single turn is too large, the cut point may land mid-turn (at an assistant message). In this case `cutPoint.isSplitTurn = true`:
**Split turns:** When a single turn is too large, the cut point may land mid-turn at an assistant message. In this case `cutPoint.isSplitTurn = true`:
```
Split turn example (one huge turn that exceeds keepRecentTokens):
@ -231,11 +231,11 @@ Split turn example (one huge turn that exceeds keepRecentTokens):
┌────────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┐
│ header │ user │ asst │ tool │ asst │ tool │ tool │ asst │ tool │ asst │
└────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘
↑ ↑
turnStartIndex = 1 firstKeptEntryIndex = 7
│ │
└────── turn prefix ────────┘ (idx 1-6, summarized separately)
└── kept messages (idx 7-9)
↑ ↑
turnStartIndex = 1 firstKeptEntryIndex = 7
│ │ (must be user/asst/bash, not tool)
└────────── turn prefix ───────────┘ (idx 1-6, summarized separately)
└── kept messages (idx 7-9)
messagesToSummarize = [] (no complete turns before this one)
messagesToKeep = [msg idx 7, msg idx 8, msg idx 9]