steveandClaude Opus 5 9eb3ec49dd fix(gif): stop making agents discover the API by failing
Closes mort#1522.

23% of all code_exec calls across two production runs (9 of 39) failed on
gifsmith API misuse, hitting 7 of 14 workers. The recovery was always the same
shape: another round trip spent printing gifsmith's own source — or, in one
case, running `dir(gifsmith)` — to learn what the module contains.

Three distinct causes, three fixes.

**Unguessable re-exports → `__all__`, plus the two that were missing.** The
module exported SOME matplotlib artists and not others, and the only way to find
out which was to fail: two workers wrote `from gifsmith import PathPatch` and
got an ImportError while `FancyBboxPatch` beside it worked. `PathPatch` and
`Path` are now exported, on the rule "the drawing vocabulary, whole". `__all__`
states the surface — and it also fixes what made self-service expensive:
`dir(gifsmith)` returned 24 names of which nine were incidental imports (glob,
os, shutil, subprocess, sys, traceback...), several being things a scene author
should never touch. SKILL.md now carries the same list, so the question should
not arise.

**Near-miss constructor kwargs → an error that names the miss.** `background=`
is accepted as an alias for `bg` (it is the obvious synonym, and an agent
reached for it). `force=` is rejected with the reason it was tempting —
`render(force="mp4")` really does take it, which makes it read like an
Animation-level setting. Anything else gets a difflib near-match and the valid
list. Both failures were one round trip each, and both are the kind a message
fixes for free.

**Scenes fail at render time → dry-run every scene at t=0 first.** A NameError
in scene 4 used to surface only after scenes 0-3 were fully rendered, and with
a streaming pipe open, after frames had gone into the encoder. Two workers lost
a whole render each to `RuntimeError: every scene failed`, learning one broken
name per attempt. One frame per scene now reports EVERY broken scene in a single
pass, before any scratch dir or ffmpeg pipe exists. Per-scene isolation is
preserved exactly: a scene that fails the dry run is marked and skipped rather
than re-run to fail identically, the others still ship, and only an
all-scenes-broken program raises early — which is precisely the case that was
paying for a full setup to learn nothing.

Verified against the production failures: `Animation(background=…)` now works,
`Animation(force=…)` explains itself, `Animation(backgrnd=…)` suggests
`background`, every name in `__all__` resolves, no incidental import leaks into
it, and the dry run marks exactly the broken scenes while leaving the good ones
untouched.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
2026-07-26 12:12:00 -04:00

executus-skills

Skill packs for executus harnesses (mort, gadfly, …), in the SKILL.md "agent-skills" format. Each pack is its own subfolder with a SKILL.md manifest plus any bundled helper files.

executus-skills/
  gif/
    SKILL.md          # instructions the agent loads on demand
    scripts/encode.py # bundled helper the agent runs in its sandbox

Packs

  • gif — make a funny animated GIF or MP4 for Discord from a description. Plans scenes, keeps recurring people/props consistent via a reusable cast, renders frames in Python, and lets a bundled encode.py pick the format: a GIF for short loops, or an H.264 MP4 (that Discord plays inline) for long bits or when a GIF comes out too big. Adapted from mort's builtin animate skill. Handles multi-minute pieces.

Using a pack from mort

Each subfolder is a separate subscription (pinned by content digest):

.set skillpacks.enabled true                       # then restart mort (boot-read)
.set skillpacks.allowed_sources git:https://gitea.stevedudenhoeffer.com/steve/
.skillpack subscribe git https://gitea.stevedudenhoeffer.com/steve/executus-skills subpath=gif ref=main

Then attach the pack to an agent that already has the tools the pack uses (the pack supplies instructions, not tools). For gif, the agent needs code_exec, image_describe, send_attachments, file_get_metadata, and think in its toolset, a generous max_runtime with critic_enabled: true (long renders run for minutes), and a sandbox image with ffmpeg (plus gifski/gifsicle for nicer GIFs). Add it in the agent's YAML:

low_level_tools: [code_exec, image_describe, send_attachments, file_get_metadata, think]
skill_packs: [gif]

When the pack is updated upstream, .skillpack check reports it and .skillpack apply gif re-pins — nothing an agent runs changes until you apply.

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Description
Common and example skills for executus.
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