A harvested single-turn Devin session spanned only 1s (reply written 1000ms after the prompt), which the engine's harvest filter conservatively classifies as a <3s headless replay (skillopt_sleep Issue #62) and skips — so a real single-turn session mined 0 tasks. Widen the prompt->reply gap to 5s. With this, an end-to-end dry-run mines the task: "night 1: 1 sessions -> 1 tasks". Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
SkillOpt-Sleep — Devin integration
Give Devin (Cognition) a nightly sleep cycle via a tiny MCP server
that exposes the skillopt_sleep engine as tools. MCP is Devin's supported way
to add custom tooling, so this works in Devin's CLI and IDE.
Devin doesn't write transcripts in the format the engine consumes, so this plugin adds a Devin-specific harvester that converts every locally available source into the Claude Code-compatible JSONL the engine reads.
What's here
| File | Purpose |
|---|---|
mcp_server.py |
stdlib-only MCP (stdio) server exposing sleep_* tools |
harvest_devin.py |
converts Devin ATIF-v1.7 transcripts + agentmemory + .devin/skills into JSONL, with taskKey + outcome envelopes |
judge.py |
reference judge for the deferred/judge branch of the validation gate |
mcp-config.example.json |
drop-in MCP server config |
devin-rules.snippet.md |
paste into .devin/rules/skillopt-sleep.md |
What it harvests
| Source | Where |
|---|---|
| Devin transcripts (ATIF-v1.7) | ~/.local/share/devin/cli/transcripts/*.json |
| agentmemory | ~/.agentmemory/standalone.json |
| Skill files | .devin/skills/*/SKILL.md |
Workspaces are auto-detected from ~/.config/Devin/User/workspaceStorage/*/workspace.json.
After sleep_adopt, the evolved skill is synced to .devin/skills/skillopt-sleep-learned/SKILL.md.
Install
Requires Python ≥ 3.10. No third-party packages — the server is pure stdlib.
-
Register the MCP server. Use
mcp-config.example.jsonas a template; setargsto the absolute path of thismcp_server.py. The engine is found automatically (this plugin lives inside the SkillOpt repo). Or via the Devin CLI:devin mcp add skillopt-sleep \ --env "SKILLOPT_DEVIN_CLAUDE_HOME=$HOME/.skillopt-sleep-devin" \ -- python3 /abs/path/to/SkillOpt/plugins/devin/mcp_server.py -
(Optional) copy
devin-rules.snippet.mdto.devin/rules/skillopt-sleep.mdso Devin proactively offers the tools. -
Ask Devin: "run the sleep cycle", "what did the last sleep propose?", "adopt it".
Tools
| Tool | What it does |
|---|---|
sleep_status |
nights run so far + latest staged proposal |
sleep_dry_run |
preview cycle — no staging, no changes |
sleep_run |
full cycle; stages a proposal for review |
sleep_adopt |
apply the staged proposal; syncs skill to the workspace |
sleep_harvest |
debug: list the recurring tasks mined |
sleep_schedule |
install a nightly cron entry (--hour / --minute) |
sleep_unschedule |
remove the nightly cron entry |
Default backend is mock (no API spend); --backend claude|codex uses your own
budget. Same engine and sleep_* interface as the other plugins — all call
python -m skillopt_sleep.