Borrowing it
Nothing to install: this file belongs to chrischall/workday-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/chrischall/workday-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/chrischall/workday-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/instructions/chrischall/workday-mcp/claude-md)<a href="https://agentmods.dev/instructions/chrischall/workday-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/chrischall/workday-mcp/claude-md.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 5.1 | $0.01077 | $0.01077 |
| Opus 5 | $0.00539 | $0.00539 |
| Sonnet 5 | $0.00215 | $0.00215 |
| Haiku 4.5 | $0.00108 | $0.00108 |
Grade A, and why
workday-mcp CLAUDE.md 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 6d 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 — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.
workday-mcp — contributor notes
Read-only MCP server for Workday, on the chrischall fleet skeleton
(@chrischall/mcp-utils + @fetchproxy/server). Full-fetchproxy archetype:
every request rides the user's signed-in *.myworkday.com tab.
Architecture
src/parse.ts— the durable core. Parses Workday's*.htmldwidget-tree JSON into a flat, secret-freeWorkdayTask, tagged with akind. Handles all seven page families: data cards (flat + list rows),gridtables,fieldSet/paneldetail pages,compositeViewworker profiles,hierarchyNavigatororg charts,landingPagehubs, and report prompt forms. Row objects are keyed by clean column names (label/value) whosepropertyNameis namespaced likewd:Label— key on the object key, NOT propertyName. Uri templates come in three dialects ({id},[IID], already-concrete) and amoniker.target(URL-encoded absolute) beats a template. Most uris need.htmldappended or they 404. Never emitssessionSecureTokenor other envelope secrets — it reads an explicit allowlist of fields only.src/redact.ts— the DUAL of the parser's allowlist: a denylist applied to raw envelopes returned byworkday_fetch/workday_graphql, covering secret key names plus values whose siblinglabelnames government/financial PII.src/client.ts— deferred config (WORKDAY_TENANTrequired,WORKDAY_HOSTdefaulted), thefetchJson/postJsonprimitives, path normalization (strips#fragments, converts copied/d/SPA URLs to data endpoints, appends.htmld), error mapping (non-2xx, SSO/sign-in bounce →SessionNotAuthenticatedError), and the composed reads:crawl(hub → child cards, bounded by depth/maxCards/visited),resolveApp/openApp(by LABEL, never a captured id),getWorker/getWorkerTask/getOrgChart, and a query-onlygraphql. Tenant-specific ids are learned at runtime — the worker-profile uri prefix comes from a live org-chart node, never a constant.src/transport-fetchproxy.ts— wraps@chrischall/mcp-utils/fetchproxy;splitHostmapswd5.myworkday.com→ domainmyworkday.com+ subdomainwd5.src/tools/*.ts—registerXxxTools(server, client)→server.registerTool.src/index.ts— wires it withrunMcp; brings the bridge up before stdio.
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.
- 6d ago First seen · 59 lines · 1,077 tokens per session scan A 1d3cc53eca10
workday-mcp CLAUDE.md is an instructions file published in the GitHub repository chrischall/workday-mcp (1 stars, last pushed yesterday), licensed MIT. It adds 1,077 tokens to every session, about $0.0054 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 2026-08-31.
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