feat(agent-adapter): per-turn provider checkpoints and the forkAfterTurn capability - #511

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Zerlight wants to merge 13 commits into

ruocheng/code-631from

ruocheng/code-632

Commits on Sep 7, 2026

feat(agent-adapter): forkAfterTurn capability and the live checkpoint contract
Zerlight
committed
f46e483
feat(agent-adapter): mint live fork checkpoints and refuse invalid ones typed
Zerlight
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08d72d3
feat(engine): fork turns at persisted provider checkpoints
Zerlight
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106b4c6
fix(agent-adapter): gate opencode turn forks and mint one checkpoint per turn
Zerlight
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9d68143
fix(engine): first live binding wins and legacy branch gates on its own capability
Zerlight
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b9a3d56
fix(engine): commit turns on the adapter's running status and never resume a checkpoint-less tip blind
Zerlight
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87f04b5
fix(engine): align pre-graph lineages to the provider corpus tail
Zerlight
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6460442
fix(engine): fork pre-graph roots after their hidden history instead of starting fresh
Zerlight
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b72d148
docs(agent-adapter): record the per-turn opencode checkpoint and the claude stop-hook cut divergence
Zerlight
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36bfaac
fix(engine): commit a turn only when its dispatch resolves, never off the adapter's running status
Zerlight
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3df0beb
fix(engine): accept a corpus-tail alignment only when it is the unique verifying one
Zerlight
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feeda3a
fix(engine): fork from the parent's own binding first and fall back to its cut on the current history
Zerlight
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29420e7
fix(agent-adapter): opencode mints a preceding checkpoint only for a user message first seen inside the turn
Zerlight
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57cc0be