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 openephemeris/openephemeris-MCP --skill hd-life-cyclesgit clone --depth 1 https://github.com/openephemeris/openephemeris-MCPWrote 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/openephemeris/openephemeris-mcp/hd-life-cycles)<a href="https://agentmods.dev/skills/openephemeris/openephemeris-mcp/hd-life-cycles"><img src="https://agentmods.dev/badge/skills/openephemeris/openephemeris-mcp/hd-life-cycles/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/openephemeris/openephemeris-mcp/hd-life-cycles"><img src="https://agentmods.dev/badge/skills/openephemeris/openephemeris-mcp/hd-life-cycles.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 | $0.00063 | $0.03129 |
| Opus 5.5 | $0.00025 | $0.01252 |
| Sonnet 5.5 | $0.00013 | $0.00626 |
| Haiku 4.5 | $0.00006 | $0.00313 |
Grade A, and why
hd-life-cycles 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 1mo 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 — 245 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Human Design Life Cycles
Use this skill when someone asks about their HD life cycle events — Saturn Return, Uranus Opposition (midlife), Chiron Return, Jupiter Return, or Uranus Return. These are the defining maturation moments where the Human Design system says consciousness matures through planetary cycles.
The Five Key Life Cycle Transits
| Transit | Age | Orbital Period | Significance |
|---|---|---|---|
| Jupiter Return | ~12, 24, 36, 48… | 11.86 years | New 12-year cycle of faith, expansion, philosophy. Subtler than the others. |
| Saturn Return | ~29 and ~58 | 29.46 years | The HD maturation point — you become your design. Before: experiment. After: Authority becomes reliable. 2nd return = mastery. |
| Uranus Opposition | ~38–42 | 84 years (½ = 42) | Individuation crisis. Uranus opposes its natal position. Breaking free from what isn't you. In HD, where differentiation actualizes. |
| Chiron Return | ~49–51 | 50.76 years | Wounded Healer integration. The wound becomes the teaching. Shift from learning about the wound to actively healing others through it. |
| Uranus Return | ~84 | 84 years | Complete individuation cycle. Rare; the elder who has lived the entire Uranus arc. |
Required Information
- Full birth date
- Birth time (precision matters — HD is time-sensitive)
- Birth location
- (Optional) Specific cycle(s) of interest, or current age — so you know which to lead with
Standard Procedure for Birth-Data Endpoints
Any endpoint that takes a birth chart (natal, synastry, composite, transits, returns, progressions, Human Design, Vedic, ACG) MUST follow this sequence. Skipping any step produces a wrong chart — usually wrong by hours of arc.
Step 1 — Resolve location to coordinates
If you don't already have precise lat/lon, call:
GET /location/autocomplete?query=<city, country>&limit=5
Confirm the right hit with the user if there's ambiguity (e.g. "Portland, OR" vs "Portland, ME"). Record the latitude and longitude of the chosen result.
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.
- 1mo ago Changed af972b95793a
- 1mo ago First seen · 245 lines · 63 tokens per session scan A f02c945dd742
hd-life-cycles is a skill published in the GitHub repository openephemeris/openephemeris-MCP (5 stars, last pushed yesterday), licensed MIT. It adds 63 tokens to every session and 3,129 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-31.
Other skills, from other repositories
astrologer-api
Integrate the hosted Astrologer API through RapidAPI for SVG charts, astrology data, Moon phases, planetary hours and XML context. Use when writing or debugging clients for this service.
panchanga-api
Vedic astrology (Jyotish) REST API powered by Swiss Ephemeris. 19 endpoints: Panchanga, Kundali (300+ Yogas, Ashtakavarga, Doshas), KP system (249 sub-lords), Dasha, Muhurta, Choghadiya, Compatibility, Transits, Vrata calendar, Remedies, Panchanga Search, and more. All calculations use Lahiri ayanamsha and sidereal…
api-integration-architect
Design, implement, debug, and optimize API integrations with expert-level patterns for REST, GraphQL, webhooks, and authentication flows.
non-json-content-types
Handle FormData, file uploads, Blob, Uint8Array, and ReadableStream inputs in tRPC mutations. Use octetInputParser from @trpc/server/http for binary data. Route non-JSON requests with splitLink and isNonJsonSerializable() from @trpc/client. FormData and binary inputs only work with mutations (POST).
mirrord-prev-env
Help users create and manage mirrord preview environments — running a modified service as an isolated pod in a shared Kubernetes cluster, scoped by an environment key and HTTP/queue traffic filtering, so teams can validate and review changes against real traffic without affecting live services. Use when a developer…
adversarial-reviewer
Stress-test a code change for concrete correctness defects, unsafe assumptions, and failure modes. Use when the user explicitly asks for an adversarial review, a deep bug hunt, or to tear a change apart, or to check your own change before submitting it. Do not use for ordinary review, style feedback, or general…