Conversation
Load bounded .hacb/CODEX_STATE-style checkpoints and inject them into the relay payload ahead of the conversation so long sessions can rely on cheap repo-local state instead of huge chat history. Only exact configured filenames inside checkpointDir are read; traversal entries are ignored; missing files are skipped; content is capped at maxCheckpointChars with an explicit truncation marker. Defaults: on, .hacb directory, four standard checkpoint files, 4,000 chars. enableCheckpointMemory false disables all filesystem access.
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What changed
Approximates "compact chat" without spending Hyperagent credits on summaries: the bridge injects a bounded checkpoint from repo-local
.hacb/files into the relay payload (beforeconversation), so long sessions can drop old turns instead of re-sending them.loadCheckpoint(config, reader?): reads only exact configured filenames insidecheckpointDir, skips missing files, rejects path traversal, caps combined content atmaxCheckpointCharswith an explicit truncation marker. Reader injectable for tests.buildRelayPrompt(...)gains an optional 5thcheckpointparam emitted as aproject_checkpointpayload key placed beforeconversation.enableCheckpointMemory: false(zero filesystem access)..hacb/added to.gitignore.Config defaults:
enableCheckpointMemory: true,checkpointDir: '.hacb', four standard files,maxCheckpointChars: 4000. No Hyperagent calls are ever spent generating checkpoints — Codex maintains them through its normal local file tools.Why it saves credits
Durable local memory replaces long chat history: old turns can be dropped while task state survives.
Testing
npm test: 81 pass, 0 fail. New tests cover labelled multi-file loading, capping, traversal rejection, disabled-means-no-I/O, payload ordering beforeconversation, and old-turn dropping with the checkpoint retained.