agent: add script healing capability - #2899
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Don't really understand, a few simple comments...feel free to ignore. Looks fine mechanically.
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A saved script can break or come back suspiciously empty after a site change. src/script/heal.zig is the deterministic core shared by both surfaces: classify a replay, raise suspicion on dry output, gate a revision's commit on curing the original finding, and atomically swap the validated script in with a refreshed // lp:baseline line. The CLI heals via --heal and the /load offer (model verdict + revision synthesis); the MCP server exposes replay and heal_commit tools so the client's own model drives diagnosis. Extract results feed a session baseline persisted on /save as evidence for later verdicts.
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Adds a
--healCLI flag and interactive REPL prompt to automatically diagnose and repair failing scripts using the LLM. The agent attempts to fix the script, then validates the revision in a fresh session before overwriting the original file.