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 Impertio-Studio/QGIS-Claude-Skill-Package --skill qgis-impl-network-analysisgit clone --depth 1 https://github.com/Impertio-Studio/QGIS-Claude-Skill-PackageWrote 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/impertio-studio/qgis-claude-skill-package/qgis-impl-network-analysis)<a href="https://agentmods.dev/skills/impertio-studio/qgis-claude-skill-package/qgis-impl-network-analysis"><img src="https://agentmods.dev/badge/skills/impertio-studio/qgis-claude-skill-package/qgis-impl-network-analysis/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/impertio-studio/qgis-claude-skill-package/qgis-impl-network-analysis"><img src="https://agentmods.dev/badge/skills/impertio-studio/qgis-claude-skill-package/qgis-impl-network-analysis.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 | $0.00103 | $0.03212 |
| Opus 5 | $0.00051 | $0.01606 |
| Sonnet 5 | $0.00021 | $0.00642 |
| Haiku 4.5 | $0.00010 | $0.00321 |
Grade A, and why
qgis-impl-network-analysis 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 12d 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 — 357 lines — stays where its author put it; the contents beside it link to each section on GitHub.
qgis-impl-network-analysis
Quick Reference
Core Classes (qgis.analysis)
| Class | Purpose |
|---|---|
QgsVectorLayerDirector |
Controls edge direction rules for a line layer |
QgsNetworkDistanceStrategy |
Cost = geometric edge length |
QgsNetworkSpeedStrategy |
Cost = travel time (from speed field) |
QgsGraphBuilder |
Constructs a QgsGraph from a directed layer |
QgsGraphAnalyzer |
Static methods: dijkstra(), shortestTree() |
QgsGraph |
In-memory graph with vertices and edges |
Workflow Steps
| Step | Class/Method | Output |
|---|---|---|
| 1. Set direction rules | QgsVectorLayerDirector(layer, ...) |
Director object |
| 2. Add cost strategy | director.addStrategy(strategy) |
Strategy index (0, 1, ...) |
| 3. Build graph | director.makeGraph(builder, points) |
Tied (snapped) points |
| 4. Get graph object | builder.graph() |
QgsGraph |
| 5. Find vertex IDs | graph.findVertex(tied_point) |
Integer vertex ID |
| 6. Run Dijkstra | QgsGraphAnalyzer.dijkstra(graph, start, criterion) |
(tree, cost) tuple |
| 7. Reconstruct path | Walk tree[] backwards from destination |
List of QgsPointXY |
Processing Algorithm IDs
| Algorithm | ID |
|---|---|
| Shortest path (point to point) | native:shortestpathpointtopoint |
| Shortest path (point to layer) | native:shortestpathpointtolayer |
| Shortest path (layer to point) | native:shortestpathlayertopoint |
| Service area (from point) | native:serviceareafrompoint |
| Service area (from layer) | native:serviceareafromlayer |
Critical Warnings
NEVER assume all edges are bidirectional -- road networks contain one-way streets. ALWAYS configure QgsVectorLayerDirector with the correct direction field and values.
ALWAYS check tree[destination_id] == -1 before path reconstruction -- this value means the destination is unreachable from the source vertex.
ALWAYS use graph.findVertex(tied_point) with the tied (snapped) point returned by makeGraph(), NOT the original input point -- the original point does not exist in the graph.
What ships with it
3 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.
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.
- 12d ago First seen · 357 lines · 103 tokens per session scan A f61193939028
qgis-impl-network-analysis is a skill published in the GitHub repository Impertio-Studio/QGIS-Claude-Skill-Package (33 stars, last pushed 2mo ago), licensed MIT. It adds 103 tokens to every session and 3,212 once invoked, about $0.0005 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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