Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add skydiscover-ai/skydiscover/plugin install skysynthWrote 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/skydiscover-ai/skydiscover/workflow)<a href="https://agentmods.dev/skills/skydiscover-ai/skydiscover/workflow"><img src="https://agentmods.dev/badge/skills/skydiscover-ai/skydiscover/workflow/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/skydiscover-ai/skydiscover/workflow"><img src="https://agentmods.dev/badge/skills/skydiscover-ai/skydiscover/workflow.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 | $0.00057 | $0.08082 |
| Opus 5 | $0.00028 | $0.04041 |
| Sonnet 5 | $0.00011 | $0.01616 |
| Haiku 4.5 | $0.00006 | $0.00808 |
Grade A, and why
skysynth 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.
How it starts
The opening of the file, as written. The whole thing — 456 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SkyDiscover-Synthesize (SkySynth): The Lead Workflow
You are the lead. The user names a system to build. You run the three stages of the SkySynth architecture below, handing each box to its role agent, and deliver a specialized system: proven or tested, benchmarked, assumptions explicit.
Initial Specification Synthesis Loop Final Deliverables
┌──────────────────────┐ ┌────────────────────────────────┐ ┌──────────────────────┐
│ Spec Builder │ │ Planner ─► Coding Agent │ │ Specialized system │
│ ─► Specification │ ──► │ ▲ │ (code, or │ ──► │ + tests or proof │
│ requirements, │ │ Critic ◄─ Evaluator ─► Auditor │ │ + score and spec.md │
│ environment, │ │ correctness, hack → │ │ │
│ workload, formal │ │ performance test │ │ │
│ spec (optional) │ │ code + proof) │ │ │
└──────────────────────┘ └────────────────────────────────┘ └──────────────────────┘
Phase 1 Phase 2 Phase 3
The lead sequences the work, resolves handoffs, records decisions, and reports the result. It never does a role's job itself; each role writes its own files.
Files
The agents/ tree is the pipeline: one brief per role, filed under the phase that runs it.
workflow/
├── SKILL.md this file: the lead's procedure
├── agents/ role briefs (agents/README.md is the map)
│ ├── 1-specification/ spec-builder, kb-builder (optional, background)
│ └── 2-synthesis-loop/ planner, coding-agent, dsa, isa, evaluator, auditor, critic
│ (Phase 3 is the auditor's final review modes)
├── references/ shared rules; read one when its concern comes up
│ ├── artifacts.md the run directory, who owns each file, the published result
│ ├── verification.md tests, measurement rules, audits, release claims
│ └── state.md the decision log, asking the user, state kept across runs
├── scripts/ the test tools: validate_test, run_tests, the release checks;
│ kb/ is the wiki schema and kbtool.py (find, page, validate, index)
├── hooks/ the delivery hook and the clone-reuse guard the agent harness runs
└── adapters/ entry points for Claude Code, Codex, and pi (Cursor needs none)
What ships with it
36 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- .claude-plugin/plugin.json 724 B
- .codex-plugin/plugin.json 859 B
- adapters/claude/commands/skysynth.md 718 B
- adapters/codex/agents.py 7.2 KB runs code
- adapters/codex/hooks.json 972 B
- adapters/codex/skills/skysynth/SKILL.md 1.1 KB
- adapters/pi/skydiscover-hooks.ts 5.1 KB runs code
- adapters/README.md 1.3 KB
- agents/1-specification/kb-builder.md 13 KB
- agents/1-specification/spec-builder.md 33 KB
- agents/2-synthesis-loop/auditor.md 16 KB
- agents/2-synthesis-loop/coding-agent.md 6.3 KB
- agents/2-synthesis-loop/critic.md 3.4 KB
- agents/2-synthesis-loop/dsa.md 4.4 KB
- agents/2-synthesis-loop/evaluator.md 12 KB
- agents/2-synthesis-loop/isa.md 2.6 KB
- agents/2-synthesis-loop/planner.md 3.9 KB
- agents/README.md 1.6 KB
- hooks/clone_reuse_guard.py 8.9 KB runs code
- hooks/delivery_check.sh 5.8 KB runs code
- hooks/framework_edit_guard.py 2.9 KB runs code
- hooks/hooks.json 879 B
- references/artifacts.md 15 KB
- references/state.md 5.7 KB
- references/verification.md 10.0 KB
- scripts/check_release.py 9.0 KB runs code
- scripts/kb/kbtool.py 20 KB runs code
- scripts/kb/README.md 1.9 KB
- scripts/kb/schema.yaml 2.2 KB
- scripts/kb/tags.yaml 932 B
- scripts/README.md 1.9 KB
- scripts/run_tests.py 6.7 KB runs code
- scripts/suite.py 4.4 KB runs code
- scripts/unattended/keepalive.sh 4.9 KB runs code
- scripts/unattended/supervisor.sh 16 KB runs code
- scripts/validate_test.py 4.1 KB runs code
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 First seen · 456 lines · 57 tokens per session scan A 0cb44a0e79ea
skysynth is a skill published in the GitHub repository skydiscover-ai/skydiscover (666 stars, last pushed 2d ago), licensed Apache-2.0. It adds 57 tokens to every session and 8,082 once invoked, about $0.0003 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 2026-09-12.
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