feat: sprout-agent + sprout-dev-mcp — minimal ACP coding agent - #493

Merged

tlongwell-block merged 84 commits into

mainfrom

tyler/sprout-agent

May 11, 2026

Commits on May 6, 2026

sprout-agent: initial scaffold compiles
tlongwell-block
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sprout-agent: integration tests pass
tlongwell-block
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sprout-agent: address round 2 review (6 fixes)
tlongwell-block
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sprout-agent: round 4 polish (6 fixes for 9/10)
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sprout-agent: round 5 safety fixes (env scrub, history validity, cwd)
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sprout-agent: round 6 (assistant text, MCP timeout, tool caps)
tlongwell-block
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sprout-agent: round 7 hardening (byte caps, regression tests, kill, budget, limits)
tlongwell-block
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sprout-agent: round 8 (tool kill, regression tests, content fix, trust doc)
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sprout-agent: round 9 (process-group kill, grandchild test, bounded error bodies)
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sprout-agent: round 10 (RAII killpg, cancel poison, transport poison)
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sprout-agent: strip comments, dedup parsers, flatten Server, helpers
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sprout-agent: aggressive LOC reduction (strip comments, inline, dedup, flatten)
tlongwell-block
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sprout-agent: extract wire.rs/config.rs, RunCtx, protocol strictness
worker-legendary
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sprout-agent: golden transcript tests + README + main.rs polish
worker-legendary
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sprout-agent: ACP schema conformance (version negotiation, ToolKind::other)
tlongwell-block
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sprout-agent: emit agent_message_chunk for non-empty assistant text (ACP compliance)
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sprout-agent: eliminate all unsafe (nix safe wrappers for process-group kill)
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sprout-agent: eliminate all expect/unwrap panic paths (mutex poison recovery)
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sprout-agent: reject duplicate MCP server names (poison correctness)
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sprout-agent: update Cargo.lock (libc → nix)
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Add sprout-dev-mcp: minimal dev MCP for sprout-agent
Tyler Longwell
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sprout-dev-mcp: fix critical safety issues (bounded capture, reap, path boundary, no panics)
tlongwell-block
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sprout-dev-mcp: fix symlink escape in str_replace path validation
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sprout-dev-mcp: 10/10 fixes (bounded inputs, tests, error handling)
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sprout-dev-mcp: kill pgid on all exits + command length cap (final 10/10 fixes)
tlongwell-block
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sprout-dev-mcp: fix pipe blocking on background children (wait→kill→read ordering)
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sprout-agent: internal handoff (context reset with LLM summary)
tlongwell-block
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sprout-agent: handoff polish (bounded prompt, clamped inputs)
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sprout-dev-mcp: remove todo tool (model uses /tmp scratchpad via shell instead)
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sprout-agent: fix clamp_bytes to stay within advertised cap (ellipsis included)
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sprout-agent: clamp_bytes handles degenerate max<4 case
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sprout-agent: add VISION.md (reviewed, corrected numbers)
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move VISION.md to repo root as VISION_AGENT.md
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VISION_AGENT.md: remove all references to specific other agents
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VISION_AGENT.md: stand alone without comparisons
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VISION_AGENT.md: final voice pass (remove LLMisms)
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fix confirmed bugs: shell deadlock, stale bootstrap, permission timeout, config validation, rg bounds
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sprout-agent: max_rounds=0 means unlimited (not invalid)
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agent: exponential backoff with jitter, raise tool name cap to 128
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agent: add SPROUT_AGENT_AUTO_APPROVE to skip permission round-trip
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Commits on May 7, 2026

Commits on May 8, 2026

Commits on May 10, 2026