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Handle numbers like they bite — float equality, currency arithmetic, rounding, division by zero, overflow, unit mismatches. Use when writing any arithmetic beyond a counter: money, percentages, averages, coordinates, durations, aggregations, or comparisons of computed values.
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基于 SOC 职业分类
Resolve ambiguous requests by investigating, choosing the best-supported reading, and stating the interpretation — instead of guessing silently or blocking on questions. Use whenever a request has multiple plausible readings or an unstated parameter (which file, which env, how thorough, what format).
Treat any change to a public or shared interface — exported functions, HTTP endpoints, CLI flags, config formats, event/message schemas, DB schemas — as a contract change with consumers you can't see. Use before modifying anything other code depends on.
When recommending between options, match the strength of the claim to the strength of the evidence — commit when evidence is clear, say it's a coin flip when it is. Use whenever the user asks "which should I use", "what's the best way", "A or B?", or you're proposing a design choice.
Fast recon before changing unfamiliar code — instructions → manifest → tree → trace one flow end-to-end → git archaeology → imitate the newest precedent. Use when starting in a repo or module you haven't touched this session, or before designing against an existing architecture.
Async/concurrent/streaming discipline — five questions (overlapping runs, check-then-act, mutation across await, response ordering, cancellation), idempotent retries, shared-state audit, race amplification. Use for async fan-out, streams/SSE, jobs, caches, or flaky timing-smell bugs.
Externalize working state to files so long tasks survive context compaction and interruption. Use at the start of any task likely to exceed ~30 minutes or span many files, and again whenever a major phase completes or the plan changes.
| name | numerical-care |
| description | Handle numbers like they bite — float equality, currency arithmetic, rounding, division by zero, overflow, unit mismatches. Use when writing any arithmetic beyond a counter: money, percentages, averages, coordinates, durations, aggregations, or comparisons of computed values. |
Numeric bugs pass every casual test and then misprice an order. The standing hazards:
==. 0.1 + 0.2 != 0.3. Compare within an epsilon appropriate to the scale, or restructure to avoid the comparison. Same for testing: assert-almost-equal, not equal./ gets the "what if the denominator is 0" question (see edge-case-sweep), and integer division vs true division checked in languages where they differ.timeout = 30 — of what?) — name variables with units (timeout_ms) when ambiguity exists.math.fsum) when it matters.Test: for each arithmetic line, "what value makes this wrong — zero, negative, huge, or 0.1?" If one does and isn't handled, it's not done.