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name: filename-convention description: "Set a filename convention that sorts, searches, and survives — date-first ISO format, the descriptor grammar, version suffixes that end the FINAL-final2 era, and the rollout that gets a team actually using it. Use when asked set up file naming rules, our filenames are chaos, what should we call our files, or fix the v2-final-FINAL problem. Produces the convention with its grammar, examples for the team's real file types, the version rule, and the one-line cheat sheet."

Filename Convention Skill

Report_final_v2_FINAL_johns-edits(2).docx is a filesystem crying for grammar. A working convention is small — date first in ISO form so files sort themselves, a few descriptor slots in fixed order, a version rule that bans "final" — and it's enforced by usefulness: names that sort chronologically and surface in search within seconds pay their own adoption. The convention fits on one line; everything longer goes unused.

What This Skill Produces

• The grammar — the slot order (YYYY-MM-DD_project_doctype_descriptor_v2) tuned to the team's real files
• Worked examples — the team's actual recent files, renamed per the grammar
• The version rule — v1, v2, v3 + -draft/-approved states; "final" banned by decree with the reason
• The one-line cheat sheet — the whole convention, postable in the folder guide

Required Inputs

Ask for these if not provided:

• The file population — what the team actually produces (contracts, decks, exports, meeting docs); the grammar's slots come from what needs distinguishing
• The sort need — chronological (date-first) vs. entity-first (acme_2026-07-19_... when browsing-by-client dominates); the retrieval pattern picks the lead slot
• Cloud-doc reality — Google Docs/Notion pages need the convention too (titles are names); versioned-by-platform files relax the version suffix
• The current chaos sample — a dozen real filenames; the before/after table is the convention's best salesman

Framework: The Grammar Rules

1. ISO date first (usually): 2026-07-19 sorts correctly forever, is unambiguous across cultures, and makes every folder self-chronologizing. The one legitimate exception: entity-first when browsing-by-entity is the dominant retrieval — pick per the team's seek pattern, once.
2. Fixed slot order, hyphen/underscore discipline: date_project_doctype_descriptor_version — underscores between slots, hyphens within them (acme-renewal). Fixed order means the eye parses filenames like a table; mixed order means reading every name in full.
3. The version rule ends the FINAL era: integers only (v1, v2), state tags where useful (v3-approved), and "final" is banned because it's a prophecy, not a state — v4-final-final2 is the ban's justification, printed on the cheat sheet. Platform-versioned files (cloud docs) drop the suffix entirely; duplicating the platform's version history in names is noise.
4. Descriptors are for humans, dates are for machines: the descriptor slot answers "which one is this" in two-to-four words (board-pack, signed-copy, eu-pricing) — jargon the team shares is fine; codes only the author knows are not.
5. Rollout by usefulness, not mandate: rename the twenty most-touched files as the demonstration, post the one-liner, and apply the convention to everything new — old files get renamed when touched (the drain rule from folder-structure-designer). Mass-renaming breaks links; opportunistic renaming doesn't.

Output Format

Filename Convention: [team]

The One-Liner (post this)

YYYY-MM-DD_project_doctype_descriptor_vN — underscores between slots, hyphens inside, ISO dates, integers for versions, "final" is banned.

Before / After

Now	Under the convention
[The team's real dozen, renamed]

Edge Rules

[Cloud docs: title = name, no version suffix · exports/receipts: date+source+period · the entity-first variant if chosen, with its why]

Quality Checks

• The lead slot matches the team's dominant retrieval pattern
• Slot order is fixed and separator discipline is stated
• "final" is banned with its printed justification
• Examples use the team's real files, not invented ones
• Rollout is new-files-plus-drain, never mass rename

Anti-Patterns

• Do not allow DD-MM vs MM-DD ambiguity — ISO or chaos, there is no third option
• Do not encode what the folder already says — Clients/Acme/acme-acme-contract wastes a slot
• Do not permit "final" even once — it's the gateway drug to FINAL-final2
• Do not design slots for files the team doesn't produce — grammar bloat kills adoption
• Do not mass-rename history — links break; the drain rule gets there without the breakage

Example Trigger Phrases

• "Set up file naming rules."
• "Our filenames are chaos."
• "What should we call our files?"
• "Fix the v2-final-FINAL problem."