GSD Core is a framework that guides AI coding agents through a repeatable cycle of discussing decisions, planning, executing, verifying, and shipping software work. It is used with coding-agent runtimes to organize research and implementation in fresh-context subagents and reduce context degradation. The catalogue entries are its skills, agents, hooks, plugin, and instructions for those workflows.
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-core --skill gsd-configgit clone --depth 1 https://github.com/open-gsd/gsd-coreWrote 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-core/gsd-config)<a href="https://agentmods.dev/skills/open-gsd/gsd-core/gsd-config"><img src="https://agentmods.dev/badge/skills/open-gsd/gsd-core/gsd-config.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00021 | $0.00607 |
| Opus 5 | $0.00010 | $0.00303 |
| Sonnet 5 | $0.00004 | $0.00121 |
| Haiku 4.5 | $0.00002 | $0.00061 |
Grade A, and why
gsd-config 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 yesterday.
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
Mode routing:
- default (no flag): Common-case toggles (model, research, plan_check, verifier, branching) → settings workflow
- --advanced: Power-user knobs (planning tuning, timeouts, branch templates, cross-AI execution) → settings-advanced workflow
- --integrations: Third-party API keys, code-review CLI routing, agent-skill injection → settings-integrations workflow
- --profile : Switch model profile (quality|balanced|budget|inherit) → set-profile (inline)
| Flag | Action | Workflow |
|---|---|---|
| (none) | Interactive 5-question common-case config prompt | settings |
| --advanced | Power-user knobs: planning, execution, discussion, cross-AI, git, runtime | settings-advanced |
| --integrations | API keys (Brave/Firecrawl/Exa), review CLI routing, agent skills | settings-integrations |
| --profile <name> | Switch model profile without interactive prompt | gsd-tools query config-set-model-profile |
<execution_context>
@/.claude/gsd-core/workflows/settings.md
@/.claude/gsd-core/workflows/settings-advanced.md
@~/.claude/gsd-core/workflows/settings-integrations.md
</execution_context>
Parse the first token of $ARGUMENTS:
- If it is
--advanced: strip the flag, execute settings-advanced workflow - If it is
--integrations: strip the flag, execute settings-integrations workflow - If it starts with
--profile: extract the profile name (remainder after--profile), then:- Verify
gsd-toolsis on PATH viacommand -v gsd-tools; if absent, emit the install hintInstall GSD via 'npm i -g @opengsd/gsd-core'and stop. - Run:
gsd-tools query config-set-model-profile <profile-name> --rawand display the output verbatim.
- Verify
- Otherwise: execute settings workflow (no argument needed)
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.
- yesterday Changed · +1 lines 6bbfec6e33be
- 8d ago First seen · 57 lines · 21 tokens per session scan A 2ae550cacdfc
gsd-config is a skill published in the GitHub repository open-gsd/gsd-core (9,217 stars, last pushed today), licensed MIT. It adds 21 tokens to every session and 607 once invoked, about $0.0001 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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