GSD Pi is a command-line coding agent and project workflow system that plans, implements, verifies, and tracks software work through milestones, tasks, Git worktrees, and stored project notes. It is for developers who want structured, longer-running agent sessions using different model providers. The catalogue entries extend GSD Pi with skills and agents.
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 skills add open-gsd/gsd-pi --skill routergit clone --depth 1 https://github.com/open-gsd/gsd-piWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/open-gsd/gsd-pi/router)<a href="https://agentmods.dev/skills/open-gsd/gsd-pi/router"><img src="https://agentmods.dev/badge/skills/open-gsd/gsd-pi/router/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/open-gsd/gsd-pi/router"><img src="https://agentmods.dev/badge/skills/open-gsd/gsd-pi/router.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00000 | $0.00392 |
| Opus 5 | $0.00000 | $0.00196 |
| Sonnet 5 | $0.00000 | $0.00078 |
| Haiku 4.5 | $0.00000 | $0.00039 |
Grade A, and why
{{SKILL_NAME}} 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 7d 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.
What it actually says
<essential_principles>
{{Core Concept}}
{{Principles that ALWAYS apply, regardless of which workflow runs}}
1. {{First principle}}
{{Explanation}}
2. {{Second principle}}
{{Explanation}}
3. {{Third principle}}
{{Explanation}} </essential_principles>
What would you like to do?
- {{First option}}
- {{Second option}}
- {{Third option}}
Wait for response before proceeding.
After reading the workflow, follow it exactly.
<quick_reference>
{{Skill Name}} Quick Reference
{{Brief reference information always useful to have visible}} </quick_reference>
<reference_index>
Domain Knowledge
All in references/:
- {{reference-1.md}} - {{purpose}}
- {{reference-2.md}} - {{purpose}} </reference_index>
<workflows_index>
Workflows
All in workflows/:
| Workflow | Purpose |
|---|---|
| {{first-workflow}}.md | {{purpose}} |
| {{second-workflow}}.md | {{purpose}} |
| {{third-workflow}}.md | {{purpose}} |
| </workflows_index> |
<success_criteria> A well-executed {{skill name}}:
- {{First criterion}}
- {{Second criterion}}
- {{Third criterion}} </success_criteria>
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.
- 7d ago First seen · 74 lines · 0 tokens per session scan A 04d49ac1ca25
{{SKILL_NAME}} is a skill published in the GitHub repository open-gsd/gsd-pi (1,218 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 392 tokens. 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 2026-09-03.
Other skills, from other repositories
gsd-graphify
Build, query, and inspect the project knowledge graph in .planning/graphs/.
gsd-import
Ingest external plans with conflict detection against project decisions before writing anything.
gsd-mempalace-capture
File a phase artifact into MemPalace; mirror decision facts into its temporal KG.
gsd-mempalace-recall
Recall decisions, patterns, and surprises from MemPalace before planning.
gsd-quick
Execute a quick task with GSD guarantees (atomic commits, state tracking) but skip optional agents.
gsd-surface
Toggle which skills are surfaced — apply a profile, list, or disable a cluster without reinstall.