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 pproenca/dot-skills --skill geohash-spatial-code-mapsgit clone --depth 1 https://github.com/pproenca/dot-skillsWrote 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/pproenca/dot-skills/geohash-spatial-code-maps)<a href="https://agentmods.dev/skills/pproenca/dot-skills/geohash-spatial-code-maps"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/geohash-spatial-code-maps/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/pproenca/dot-skills/geohash-spatial-code-maps"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/geohash-spatial-code-maps.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00182 | $0.02436 |
| Opus 5 | $0.00091 | $0.01218 |
| Sonnet 5 | $0.00036 | $0.00487 |
| Haiku 4.5 | $0.00018 | $0.00244 |
Grade A, and why
geohash-spatial-code-maps 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 5d 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 — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Geohash & Spatial Code Maps Best Practices
How to implement geohashes correctly in TypeScript and Rust, how to query and index them at scale, and how to apply them to the "codebase as a navigable 2D map" pattern — projecting code into a plane so geohash prefixes become domain regions you can fly through like Google Maps. Contains 42 rules across 8 categories, prioritised by impact.
When to Apply
Reference these guidelines when:
- Implementing or reviewing a geohash encoder/decoder in TypeScript or Rust (bit interleaving, base32, precision, neighbours)
- Building proximity / radius / bounding-box search on lat/lon data, or storing geohashes as index keys (SQL B-tree, Redis sorted sets)
- Debugging the classic geohash bugs — swapped axes, wrong alphabet, border false negatives, off-by-one cells at high precision
- Projecting a codebase (or any abstract graph) into a 2D plane and geohashing it so prefixes name business domains or features
- Navigating a geohashed dataset like a slippy map: zoom-to-precision, viewport tile loading, level-of-detail aggregation, prefix clustering, deep links
A note on scope
Categories 1–4, 6, and 7 are textbook geohashing, drawn from authoritative sources (the geohash spec, the davetroy/geohash-js neighbour tables, Redis, Elasticsearch). Categories 5 (map-) and 8 (nav-) are a novel synthesis — there is no canonical "geohash your codebase" library, so those rules derive design principles from established techniques (deterministic graph layout, Morton/Z-order keys, slippy-map tiling, software cartography). They are honest about when the pattern is overkill.
Rule Categories by Priority
| Priority | Category | Impact | Prefix | Rules |
|---|---|---|---|---|
| 1 | Encoding & Bit Interleaving | CRITICAL | enc- |
6 |
| 2 | Precision & Cell Geometry | CRITICAL | prec- |
5 |
| 3 | Neighbours & Adjacency | HIGH | nbr- |
5 |
| 4 | Proximity & Range Queries | HIGH | qry- |
5 |
| 5 | Codebase-as-Map Spatial Layout | HIGH | map- |
7 |
| 6 | Decoding & Bounding Boxes | MEDIUM-HIGH | dec- |
4 |
| 7 | Spatial Indexing & Storage | MEDIUM-HIGH | idx- |
5 |
| 8 | Navigation & Rendering | MEDIUM | nav- |
5 |
What ships with it
46 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.
- AGENTS.md 10 KB
- assets/templates/_template.md 984 B
- metadata.json 1.7 KB
- references/_sections.md 3.2 KB
- references/dec-avoid-roundtrip-reencode.md 1.5 KB
- references/dec-decode-to-bbox.md 1.9 KB
- references/dec-precompute-reverse-alphabet.md 1.6 KB
- references/dec-symmetric-interval-reconstruction.md 1.9 KB
- references/enc-base32-alphabet.md 1.9 KB
- references/enc-binary-chop-no-float-drift.md 1.7 KB
- references/enc-five-bit-char-boundary.md 1.9 KB
- references/enc-integer-morton-encode.md 2.9 KB
- references/enc-interleave-longitude-first.md 3.3 KB
- references/enc-normalize-input-domain.md 2.1 KB
- references/idx-db-prefix-index.md 1.8 KB
- references/idx-integer-sortable-key.md 1.8 KB
- references/idx-range-query-from-covering-set.md 1.8 KB
- references/idx-sorted-string-range-scan.md 2.1 KB
- references/idx-trie-hierarchical-bucketing.md 2.2 KB
- references/map-coupling-implies-proximity.md 1.9 KB
- references/map-deterministic-projection.md 2.2 KB
- references/map-normalize-to-geohash-domain.md 2.1 KB
- references/map-persist-coordinate-sidecar.md 2.0 KB
- references/map-precision-as-architectural-level.md 1.8 KB
- references/map-prefix-as-domain-region.md 2.1 KB
- references/map-stable-coordinates.md 1.9 KB
- references/nav-breadcrumb-prefix-path.md 1.9 KB
- references/nav-cluster-by-prefix.md 1.7 KB
- references/nav-level-of-detail-aggregation.md 1.8 KB
- references/nav-precision-to-zoom-levels.md 1.8 KB
- references/nav-tile-lazy-loading.md 1.6 KB
- references/nbr-antimeridian-wrap.md 1.7 KB
- references/nbr-canonical-lookup-tables.md 2.6 KB
- references/nbr-eight-neighbor-set.md 1.8 KB
- references/nbr-integer-level-neighbors.md 1.8 KB
- references/nbr-pole-handling.md 1.6 KB
- references/prec-avoid-mixed-precision.md 1.9 KB
- references/prec-cells-are-not-square.md 1.9 KB
- references/prec-cells-shrink-toward-poles.md 1.9 KB
- references/prec-choose-from-error-radius.md 1.9 KB
- references/prec-error-is-half-cell.md 1.6 KB
- references/qry-bbox-range-decomposition.md 1.9 KB
- references/qry-expand-precision-when-sparse.md 1.9 KB
- references/qry-precision-from-radius.md 1.5 KB
- references/qry-refine-with-haversine.md 2.2 KB
- references/qry-search-cell-plus-neighbors.md 1.8 KB
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.
- 5d ago First seen · 120 lines · 182 tokens per session scan A 565df0c5ae53
geohash-spatial-code-maps is a skill published in the GitHub repository pproenca/dot-skills (205 stars, last pushed 24d ago), licensed MIT. It adds 182 tokens to every session and 2,436 once invoked, about $0.0009 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 2026-09-03.
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