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

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Merged
tlongwell-block merged 84 commits into from
May 11, 2026
Merged

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

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3b23e9f
sprout-agent: initial scaffold compiles
tlongwell-block May 6, 2026
c274fa1
sprout-agent: integration tests pass
tlongwell-block May 6, 2026
bc9f1fc
sprout-agent: address round 2 review (6 fixes)
tlongwell-block May 6, 2026
eaf8a7a
sprout-agent: round 4 polish (6 fixes for 9/10)
tlongwell-block May 6, 2026
25f82e2
sprout-agent: round 5 safety fixes (env scrub, history validity, cwd)
tlongwell-block May 6, 2026
268682f
sprout-agent: round 6 (assistant text, MCP timeout, tool caps)
tlongwell-block May 6, 2026
8c740b8
sprout-agent: round 7 hardening (byte caps, regression tests, kill, b…
tlongwell-block May 6, 2026
9f7ab26
sprout-agent: round 8 (tool kill, regression tests, content fix, trus…
tlongwell-block May 6, 2026
22bc496
sprout-agent: round 9 (process-group kill, grandchild test, bounded e…
tlongwell-block May 6, 2026
270a539
sprout-agent: round 10 (RAII killpg, cancel poison, transport poison)
tlongwell-block May 6, 2026
9fddcf2
sprout-agent: strip comments, dedup parsers, flatten Server, helpers
tlongwell-block May 6, 2026
55e3dae
sprout-agent: aggressive LOC reduction (strip comments, inline, dedup…
tlongwell-block May 6, 2026
efceb74
sprout-agent: extract wire.rs/config.rs, RunCtx, protocol strictness
May 6, 2026
0c788af
sprout-agent: golden transcript tests + README + main.rs polish
May 6, 2026
07189e3
sprout-agent: ACP schema conformance (version negotiation, ToolKind::…
tlongwell-block May 6, 2026
c9c39cb
sprout-agent: emit agent_message_chunk for non-empty assistant text (…
tlongwell-block May 6, 2026
f1eb058
sprout-agent: eliminate all unsafe (nix safe wrappers for process-gro…
tlongwell-block May 6, 2026
52ece24
sprout-agent: eliminate all expect/unwrap panic paths (mutex poison r…
tlongwell-block May 6, 2026
23480d8
sprout-agent: reject duplicate MCP server names (poison correctness)
tlongwell-block May 6, 2026
a0f09f7
sprout-agent: update Cargo.lock (libc → nix)
tlongwell-block May 6, 2026
eb13ea3
Add sprout-dev-mcp: minimal dev MCP for sprout-agent
May 6, 2026
cbb243a
sprout-dev-mcp: fix critical safety issues (bounded capture, reap, pa…
tlongwell-block May 6, 2026
3381ade
sprout-dev-mcp: fix symlink escape in str_replace path validation
tlongwell-block May 6, 2026
d4fff6f
sprout-dev-mcp: 10/10 fixes (bounded inputs, tests, error handling)
tlongwell-block May 6, 2026
6912f0c
sprout-dev-mcp: kill pgid on all exits + command length cap (final 10…
tlongwell-block May 6, 2026
91d8a8b
sprout-dev-mcp: fix pipe blocking on background children (wait→kill→r…
tlongwell-block May 6, 2026
4d730c2
sprout-agent: internal handoff (context reset with LLM summary)
tlongwell-block May 6, 2026
c68cf60
sprout-agent: handoff polish (bounded prompt, clamped inputs)
tlongwell-block May 6, 2026
e043de1
sprout-dev-mcp: remove todo tool (model uses /tmp scratchpad via shel…
tlongwell-block May 6, 2026
2a82c83
sprout-agent: fix clamp_bytes to stay within advertised cap (ellipsis…
tlongwell-block May 6, 2026
ee16cbb
sprout-agent: clamp_bytes handles degenerate max<4 case
tlongwell-block May 6, 2026
9d35089
sprout-agent: add VISION.md (reviewed, corrected numbers)
tlongwell-block May 6, 2026
504c4ef
move VISION.md to repo root as VISION_AGENT.md
tlongwell-block May 6, 2026
6c481a2
VISION_AGENT.md: remove all references to specific other agents
tlongwell-block May 6, 2026
d10e954
VISION_AGENT.md: stand alone without comparisons
tlongwell-block May 6, 2026
2121135
VISION_AGENT.md: final voice pass (remove LLMisms)
tlongwell-block May 6, 2026
62af85b
fix confirmed bugs: shell deadlock, stale bootstrap, permission timeo…
tlongwell-block May 6, 2026
76c19d9
sprout-agent: max_rounds=0 means unlimited (not invalid)
tlongwell-block May 6, 2026
b470bc2
agent: exponential backoff with jitter, raise tool name cap to 128
tlongwell-block May 6, 2026
f12c886
agent: add SPROUT_AGENT_AUTO_APPROVE to skip permission round-trip
tlongwell-block May 6, 2026
de63943
agent: MCP server lifecycle — lazy restart with ArcSwap
tlongwell-block May 7, 2026
225879b
agent: hardening pass — 30+ fixes from 4-model crossfire review
tlongwell-block May 7, 2026
b2961f9
agent: multi-session support (up to SPROUT_AGENT_MAX_SESSIONS, defaul…
tlongwell-block May 7, 2026
16eb012
agent: parallel tool call execution (opt-in via SPROUT_AGENT_PARALLEL…
tlongwell-block May 7, 2026
a089861
agent: unify tool execution into single path, remove permissions
tlongwell-block May 7, 2026
2ce81da
agent: default max_parallel_tools to 8
tlongwell-block May 7, 2026
833947e
agent: fix cancel edge case, update README
tlongwell-block May 7, 2026
19580d9
docs: update README to reflect multi-session architecture
tlongwell-block May 7, 2026
9cd6c9f
sprout-agent: add todo tool — in-memory task tracking with end-turn e…
tlongwell-block May 7, 2026
f664a4e
sprout-agent: add integration test proving todo enforcement blocks pr…
tlongwell-block May 7, 2026
96d6693
sprout-agent: add doom loop detector — repeating tool-call pattern de…
tlongwell-block May 7, 2026
4c9671e
sprout-agent: add tool error reflection — diagnose before retry
tlongwell-block May 7, 2026
422793e
sprout-agent: doom loop v2 — fix cross-prompt state, order-independen…
tlongwell-block May 7, 2026
ff7e2c1
sprout-agent: doom loop injection doesn't consume a round
tlongwell-block May 7, 2026
cd0ccd7
sprout-agent: vision pass — subtract dead code, simplify, earn every …
tlongwell-block May 7, 2026
54c0c48
sprout-agent: final shape — delete doom_loop, simplify todo to 2-stat…
tlongwell-block May 7, 2026
f0624f5
sprout-agent: remove strikes — enforcement is absolute, max_rounds is…
tlongwell-block May 7, 2026
561a0ab
docs: update VISION_AGENT.md — acknowledge todo tool re-introduction
tlongwell-block May 7, 2026
522d155
sprout-agent: fix clippy warnings (unused mut, single-char push_str)
tlongwell-block May 7, 2026
aa6e62e
sprout-agent: remove banner decoration — enforcement is the mechanism…
tlongwell-block May 7, 2026
c4e137d
docs: refine Minimal principle, remove stale doom_loop env vars from …
tlongwell-block May 8, 2026
2b76c50
sprout-agent: kill MCP process group on tool timeout (was mark-dead o…
tlongwell-block May 8, 2026
2b7f8d1
sprout-dev-mcp: async graceful kill, immediate kill in Drop
tlongwell-block May 8, 2026
bd9011c
sprout-dev-mcp: enforce workdir within server cwd for both tools
tlongwell-block May 8, 2026
5cd4fab
Revert "sprout-dev-mcp: enforce workdir within server cwd for both to…
tlongwell-block May 8, 2026
0637f6d
sprout-dev-mcp: remove workdir escape check — sandboxing is the opera…
tlongwell-block May 8, 2026
e37a925
sprout-agent: kill_server counts toward restart budget (attempts: 1, …
tlongwell-block May 8, 2026
9d88428
sprout-agent: spawn session/new so it doesn't block the read loop
tlongwell-block May 8, 2026
845b7d2
chore: cargo fmt
tlongwell-block May 8, 2026
0735836
sprout: simplify todo, add tree shim, trim descriptions and comments
tlongwell-block May 8, 2026
780e628
sprout-dev-mcp: tree early bail-out on line budget
tlongwell-block May 8, 2026
98ec93a
sprout-dev-mcp: harden tree — file size cap, broken pipe, saturating_…
tlongwell-block May 8, 2026
47b534c
sprout-dev-mcp: tree respects .gitignore via ignore crate
tlongwell-block May 8, 2026
a9a8710
docs: update numbers to match current state
tlongwell-block May 8, 2026
e456f11
fix: remove bare unwrap in tree.rs to uphold zero-panic guarantee
tlongwell-block May 8, 2026
8bd6a3f
feat: replace built-in todo with MCP lifecycle hooks (_Stop, _PostCom…
tlongwell-block May 9, 2026
80fc89e
Update README.md
tlongwell-block May 9, 2026
dfeba1b
Update VISION_AGENT.md
tlongwell-block May 9, 2026
be8bd4d
merge: pull in origin/main
tlongwell-block May 9, 2026
5d7f3c3
style: cargo fmt
tlongwell-block May 9, 2026
a875ad8
refactor: simplify todo schema — drop IDs, add silent-removal detection
tlongwell-block May 9, 2026
f75de69
Delete Dockerfile.bench
tlongwell-block May 9, 2026
c29ab4b
chore: fix doc drift, remove LOC claims, migrate logging to tracing
tlongwell-block May 10, 2026
711bdd5
feat(agent): propagate MCP notifications/cancelled on session cancel
tlongwell-block May 10, 2026
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190 changes: 173 additions & 17 deletions Cargo.lock
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