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ai deep-dive 跟成熟 coding agent 學設計

Learning Design from Mature Coding Agents (18): Toolset Design Philosophy — Drawing the Tool Surface Boundary

Rivumi's core surface has grown from seven tools to nine with a read-only `tool_program` and rollback-capable `tool_transaction`; search prefers ripgrep and arbitrary shell remains absent. Native MCP tools join only from allowlisted servers and default to execute approval without trusted read-only metadata.

#coding-agent#tool-design#rivumi#function-calling#claude-code
ai deep-dive 跟成熟 coding agent 學設計

Learning Design from Mature Coding Agents (10): Edit Tool Trade-offs — unified diff, exact edit, hashline, and whole-file

LLMs break unified diffs on bookkeeping: wrong hunk counts, hallucinated context lines. The five reference projects split into two camps — simplify the diff grammar (Codex drops line numbers), or drop diffs entirely (Claude Code/Pi/OpenCode exact replace); OMP goes further by binding read state into the format via hash anchors. rivumi took the minimal-intervention path: keep the guarded apply_patch, add a zero-fuzzy replace_text, and its qwen3:4b eval went from stable failure to 5/5.

#coding-agent#harness-engineering#edit-tool#unified-diff#llm#tool-design