d6da8ca29aa027df8928f0cdb60e583899b17fb5
Codex round 1 CBR-001: a head-anchored compaction checkpoint was mis-classified by the log-position step-alignment scan, so a second auto-compaction over a checkpoint-headed surface silently failed. Root cause: `isStepAlignedStart/End` scanned the LOG by seq, but a `replace` op lands a checkpoint at a high log seq whose SURFACE position is the head — its log neighbours (the open step's assistant/message) are not its surface neighbours, so the forward scan wrongly reported mid-step. Fix, per the agreed direction: - Replace the two log-position predicates with one surface-anchored helper `isToolPairingBalanced(nodes, events, beforeSeq)` in `dsh-session` (renamed step-boundary.ts → tool-pairing.ts). A cut is balanced when no unanswered tool-call precedes it on the surface; a region is collapsible iff both edges are balanced cuts. The open-tail and free-node cases fall out of the same counter. It also throws on a corrupt surface (a tool/result with no matching call). - Move compaction off the in-step seam to a new "pre-step" seam fired after turn/start and before step/start, so a compaction's log-only compact/* records and its replacement node land cleanly OUTSIDE any step (the honest structure crash-safety relies on). Renamed the event agent/pre-request → agent/pre-step and switched its dispatch from parallel → serial (listeners mutate the surface as a side effect; serial isolates them so concurrent appends can't interleave). Extended the catalog generator to accept @mode serial. Regression coverage: a real-loop test driving an auto-compaction asserts the landed checkpoint is a balanced cut on both sides; unit tests pin the checkpoint case, the mid-step injection case, multi-call steps, and the corrupt-surface guard. Proven red on the old log-position logic.
DeepSeek Harness
Monorepo for the DeepSeek Harness group.
Projects
- DeepSeek Code — DeepSeek's coding agent product.
Development
This monorepo is built on the Cordis framework (vendored as source under vendor/), microkernel-style: everything is a plugin.
pnpm install
pnpm run test # vitest
pnpm run demo:echo # runnable echo-agent example (no API key needed)
pnpm run demo:coding # the real DeepSeek coding agent (needs DEEPSEEK_API_KEY)
For humans, start with the development guide for local setup, hooks, environment variables, and quality gates, then read the architecture design before package work. Local context lives in packages/ and vendor/.
For agents, follow AGENTS.md.
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