| # Hydrogen computer app |
|
|
| Exported by REA's `export-desktop-application` from a capture of the `hydrogen` package |
| (capture Evidence `ev_a1833b86c146e19d831723570e4627d5ce982983af7091cf3790ef22ae27d682`). It was checked against agentenv-framework |
| 0.9.1431. |
|
|
| - `envs/hydrogen/` is a computer app on the `ubuntu-24.04` base with the `reference` driver, for |
| `amd64` and `arm64`. It installs `hydrogen` from the distribution archive, launches `sh -c cd "$HOME" 2>/dev/null; exec 'hydrogen' "$HOME"/'Documents/backbeat.h2song'` at boot and is ready |
| when a window of class `Hydrogen` appears. |
| - Installed beside the app because the export was asked for them with `--extra-package`, as a build computer asks |
| for the packages its request named: `pulseaudio`. |
| - At launch the app opens `~/Documents/backbeat.h2song`, the seed's one document. |
| - Owned paths: `~/.hydrogen`, `~/Documents`. |
| `data/get` returns their files and a typed JSON view of each; `data/reset` restores the seed. |
| - Seed: 3 file(s) made for the task, as saved at checkpoint `seed`. |
| Text files and dconf keys spell the capture host's name as `localhost`, `user@host` as `user@localhost` |
| and the home as `/home/user`, which the computer respells to its own at boot. |
| - Neither owned nor seeded, so the app starts without what it saved there: these files or folders, which changed |
| during the capture, `~/.config/QtProject.conf`. |
| To own them, capture again naming them with `state_paths` on `start_build_capture`, or `--state-path` on `capture-desktop-application`. |
| - `tasks/smoke.json` deploys the app. |
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| Run the task with `agent-env run <this folder>`, or only the deploy with `--task smoke`. |
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| The seed was made for this task, not taken from a user's own data; read `envs/hydrogen/seed/` before publishing the bundle. |
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|
| ## Task `change-tempo` |
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| `tasks/change-tempo.json` deploys the app, has the agent work through the computer from the prompt below, and grades |
| the outcome with `artifacts/change-tempo-check/verify.py`, which reads the app's `data/get` views and needs |
| no model. It grades once the app's files have held for 3 s, so a save the app makes on its own within that |
| time of the agent stopping counts; each result's `settled` is false when they were still changing 15 s after the |
| first read. `evals/hydrogen.toml` names it, so a run of the bundle runs it. |
|
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| > In Hydrogen, change the tempo of the Backbeat Sketch song in Documents/backbeat.h2song to 112 BPM and save it. |
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| Checks, each of which must pass: |
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| - `tempo`: `{"kind":"text_equals","file":"Documents/backbeat.h2song","pointer":"/root/children/[name=bpm]","value":"112"}` |
| - `song-name-kept`: `{"kind":"text_equals","file":"Documents/backbeat.h2song","pointer":"/root/children/[name=name]","value":"Backbeat Sketch"}` |
| - `groove-notes-kept`: `{"kind":"member_count","file":"Documents/backbeat.h2song","pointer":"/root/children/[name=patternList]/children/[name=pattern][>name=Verse Groove]/children/[name=noteList]/children","matching":"[name=note]","equals":8}` |
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| REA kept the task because its checks fail on the seed (`tempo`) and all |
| pass on the captured end state. |
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| To measure a solve rate, run the task k times (3 by default) with the agent and model to measure, and count the runs |
| whose summary line says `passed`; a run that says `failed` did not finish and is run again rather than counted: |
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| agent-env run <this folder> --task change-tempo --agent claude-code --model MODEL |
| |
