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Normalize a CSV's EUR amounts to USD using live FX rates, with a graceful offline fallback. Use to convert or normalize a currency column in tabular data.
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SOC 職業分類に基づく
Test or debug a Claude Code skill/plugin under Claude Cowork's runtime — sandboxed agent, default-deny egress, the can_use_tool permission/question protocol — using the cowork-harness CLI. Use when validating or regression-testing a skill, authoring or debugging a scenario YAML (prompt + scripted answers + assert:), choosing a fidelity tier, scripting AskUserQuestion / tool-permission answers, or asserting artifacts, egress, or sub-agent dispatch. Especially when a harness run no-ops an assertion, fails on an unanswered gate, false-greens, a steered answer never reaches the model, or a web_fetch is unexpectedly denied or gated. Also when iterating or hardening a skill across fixes, or grounding a skill's self-critique against its own run evidence — including a document-analysis skill (cap table, deck, financial model, transcript) that needs an uploaded file attached to be critiqued at all. NOT for generic unit testing (pytest/vitest of your own scripts) or non-Cowork CI. Covers the skill / run / chat / record
Live-lane probe — dispatches one sub-agent that must research with the WebSearch tool.
Live-lane probe — reads an attached uploaded file with the Read tool and quotes its marker line.
Internal harness probe for resume-continuity. Use when asked to run the resume-continuity probe, to load the probe skill, or to retrieve the vault passphrase.
fixture skill A — has a candidate source under scripts/
fixture skill B — sibling of skill-a, must be excluded when the target is skill-a directly
| name | csv-fx-normalize |
| description | Normalize a CSV's EUR amounts to USD using live FX rates, with a graceful offline fallback. Use to convert or normalize a currency column in tabular data. |
Converts EUR amounts in a CSV to USD using a live exchange rate, via a bundled
producer script (scripts/normalize.py). The skill's job genuinely needs the
network — fetching the rate — so this is also the worked example of degrading
gracefully under a sealed network: in Cowork (default-deny egress) the rate fetch
is blocked, and the skill falls back to reporting amounts in their source currency,
clearly flagged. It never fails or hangs because the network is sealed.
The user has a CSV with a EUR-denominated amount_eur column and wants it normalized
to USD.
Locate the CSV. Default for this example: uploads/sales_eur.csv.
Run the bundled producer (reachable via ${CLAUDE_PLUGIN_ROOT}):
python3 "${CLAUDE_PLUGIN_ROOT}/skills/csv-fx-normalize/scripts/normalize.py" uploads/sales_eur.csv outputs
It makes one outbound call — to a public FX API — to get the EUR→USD rate. If that
call is blocked (as it is under Cowork's default-deny egress), it falls back to the
source currency. Either way it writes outputs/normalized.json and
outputs/summary.md and prints a one-line summary.
Read outputs/summary.md and tell the user whether the amounts were converted to
USD or it fell back to source currency (offline), plus the path to the JSON.
outputs/ as write-once for the deliverable.