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 agentmods add rules/jrpease/throughline/token-crosswalk-buildergit clone --depth 1 https://github.com/jrpease/throughlineWrote 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/rules/jrpease/throughline/token-crosswalk-builder)<a href="https://agentmods.dev/rules/jrpease/throughline/token-crosswalk-builder"><img src="https://agentmods.dev/badge/rules/jrpease/throughline/token-crosswalk-builder.svg" alt="Measured on agentmods" 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 | $0.00115 | $0.01738 |
| Opus 5 | $0.00057 | $0.00869 |
| Sonnet 5 | $0.00023 | $0.00348 |
| Haiku 4.5 | $0.00012 | $0.00174 |
Grade A, and why
token-crosswalk-builder 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 today.
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 — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Token crosswalk builder
Builds the backbone artifact of a brownfield retrofit: crosswalk.json, a
persistent three-way map of new token ↔ old Figma variable ↔ old code identifier.
It drives the code retrofit and the tokens:validate CI gate. This skill also
installs the canonical scripts into the user's repo and wires the gate.
This is a brownfield skill. Before doing anything, read
.throughline/references/brownfield-retrofit.md (read discipline, the 7
guardrails, the safe sequence) and
.throughline/references/crosswalk-schema.md (the exact contract). Greenfield
builds don't need this skill.
Calibrate
Read user.codingLevel (.throughline/references/coding-level.md) and scale
explanation accordingly. The crosswalk involves JSON, npm scripts, and a CI gate — for
new users explain each plainly the first time; for comfortable users be terse.
Actions are identical across levels.
Prerequisites (offer to run them, don't bail)
Read the manifest. This skill needs:
- A DTCG token source at
packages/tokens/dtcg/tokens.json— the validator resolves against it. If it doesn't exist, offer to runtoken-sync-layerfirst (it emits this file). Apply the read discipline: confirm the file exists by reading it, never assume it's absent without looking. - The audit inputs — ideally the
auditmanifest section (code surface, Figma inventory,percentSemantic) populated bydesign-system-audit. Ifauditis present, use it to seed the rows. If it isnull(audit hasn't run — it lands in Plan 3), don't block: ask the user for the old→new mapping inputs directly (which old Figma variables and code symbols map to which new tokens), and proceed. Note plainly that runningdesign-system-auditfirst would pre-fill this. - A repo at
local-gitorgithub(workspace.stage) so the installed scripts andpackage.jsonchanges land as a reviewable diff/PR. If stillfolder, offerrepository-builder.
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.
- today Changed · +2 lines 20fef6a5174d
- 4d ago First seen · 127 lines · 115 tokens per session scan A 2e5338396e6b
token-crosswalk-builder is a cursor rule published in the GitHub repository jrpease/throughline (76 stars, last pushed 3d ago), licensed MIT. It adds 115 tokens to every session and 1,738 once invoked, about $0.0006 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.
Other cursor rules, from other repositories
prototype-previewer
Build interactive prototype reviewers with synced review notes and Figma capture pages.
figma-performance
Handling large documents efficiently in the Plugin API.
7-day-nextjs-web-design-cursor
A seven-day design workflow for web products that will be built in Next.js.
principle-reinterpretation-system
デザイン原則の再解釈システム - 全体ロジック説明.
mermaid
Diagram Creator. Load when the user requests "Create a diagram".
angular-20
This rule provides comprehensive best practices and coding standards for Angular development, focusing on modern TypeScript, standalone components, signals, and performance optimizations.