Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/runkids/skillshare/skillshare-devcontainernpx skills add runkids/skillshare --skill skillshare-devcontainergit clone --depth 1 https://github.com/runkids/skillshareWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00122 | $0.02047 |
| Opus 5 | $0.00061 | $0.01024 |
| Sonnet 5 | $0.00024 | $0.00409 |
| Haiku 4.5 | $0.00012 | $0.00205 |
Grade A, and why
skillshare-devcontainer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 212 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Execute CLI commands and tests inside the devcontainer. The host machine is macOS but the project binary is Linux — running CLI commands on the host will silently produce wrong results or fail. This skill prevents that mistake.
When to Use This
- Running
ss/skillsharecommands for verification - Running
go test,make test,make check - Reproducing a bug report
- Testing a feature you just implemented
- Starting the web UI dashboard
- Any command that needs the skillshare binary or Go toolchain
When NOT to Use This
- Editing source code (do that on host via Read/Edit tools)
- Running
gitcommands (git works on host) - Running
make fmt,make lint(host-safe Go toolchain commands; no container needed) - E2E test runbooks → use
cli-e2e-testskill instead (it handles ssenv isolation)
Architecture: Two Layers of Isolation
Host (macOS)
└─ Devcontainer (Linux, Debian-based)
├─ Default HOME: /home/developer (persistent volume)
├─ Source: /workspace (bind-mount of repo root)
└─ ssenv environments: ~/.ss-envs/<name>/ (isolated HOME dirs)
Devcontainer = Linux environment with Go, git, pnpm, air (hot-reload). Source code is at /workspace (bind-mount of the host repo). The ss / skillshare wrapper auto-builds from source on every invocation — no manual make build needed. Edit code on the host, then immediately docker exec to run it; the change is picked up automatically.
ssenv = Isolated HOME directories within the devcontainer. Each env gets its own ~/.config/skillshare/, ~/.claude/, etc. Use ssenv when you need a clean state (testing init, install, sync) without polluting the container's default HOME.
Zero-Rebuild Workflow
Source code is bind-mounted into the container at /workspace. The ss wrapper runs go build transparently on every invocation:
- Edit files on host (Read/Edit tools)
docker exec $CONTAINER ss <command>— picks up your changes instantly- No
make build, no restart, no rebuild step
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 212 lines · 122 tokens per session scan A 22d3116b5bb9
skillshare-devcontainer is a skill published in the GitHub repository runkids/skillshare (2,597 stars, last pushed 5d ago), licensed MIT. It adds 122 tokens to every session and 2,047 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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