Edit

Iceberg Editor

Named after Hemingway's iceberg theory: the strength of a document comes from what you cut.

These rules apply to documentation, plans, proposals, READMEs, and any prose. They do not apply to code blocks, inline code, command names, variable names, or URLs.

Input

• /iceberg:edit <file-path> — read the file, apply rules, write it back in place. Resolve relative paths from the current working directory.
• /iceberg:edit <file-path> "intent description" — edit while preserving the intended voice
• /iceberg:edit — user pastes text; return the rewritten version
• Automatic — apply to every plan and output document before returning it to the user

If no intent is provided, infer it from document signals before editing. Three profiles: technical (default), conversational (guides/tutorials — skip Rules 9, 11, 12), executive (summaries/proposals — treat Rules 5, 8, 12, 13 as HIGH priority). Pass intent and inferred profile through to the subagent for long documents.

Skip: code-only responses, shell output, error messages, stack traces, files under vendor/, node_modules/, or dist/, any document under 50 words.

The 14 Rules

1. Short sentences

Target 15–20 words. At 25 words, find a split point. At 30 words, split unconditionally. Break at conjunctions, relative clauses, or participial phrases.

2. Active voice

Find the actor. Make it the subject. Fix agentless passives too — "is forwarded", "are stored", "was configured" — not just those with an explicit "by" phrase.

• "The config is loaded by the server" → "The server loads the config"
• "Events are forwarded to replicas" → "The coordinator forwards events to replicas"
• Keep passive only when the actor is unknown or irrelevant.

3. Strong verbs, no adverbs

An adverb is a verb you haven't found yet.

• "runs slowly" → "stalls"
• "quickly processes" → "processes"
• If no stronger verb exists, keep the adverb.

4. Delete qualifiers and hedges

Remove: very, quite, somewhat, rather, fairly, essentially, basically, arguably, maybe, perhaps, appears to, tends to, could potentially, a bit, sort of, kind of.

• If the sentence is false without the qualifier, rewrite the sentence — don't just delete the word.

5. Concrete nouns

Replace abstract categories with specific things. Signal words to watch: solution, approach, initiative, framework, experience, value, requirements, functionality, ecosystem, posture, collaboration, improvement.

• "implement a comprehensive solution" → "add a retry loop"
• "improve the developer experience" → "cut the build time to under 10 seconds"
• "handle edge cases" → "handle empty arrays and null values"

6. One idea per sentence

One main clause. Break at "and," "which," "that," or "but" when each side could stand alone.

• "The system fetches the config and then validates it, which can take up to 500ms." → "The system fetches the config. Validation takes up to 500ms."

7. Conditions before instructions

The reader needs to know whether to act before reading what to do. Pattern to fix: "do X if Y" → "if Y, do X".

• "If the cache is cold, run the warm-up script" — not "Run the warm-up script if the cache is cold."
• "If you observe quota exhaustion, reduce the burst limit." — not "Reduce the burst limit if you observe quota exhaustion."

8. Lead with the answer

Put the conclusion in the first sentence. Context and reasoning follow. Never bury the key finding. Exception: do not restructure sections explicitly titled Background, Overview, Context, or How it works — these sections are intentionally ordered from context to conclusion.

9. Second person

Use "you" for instructions. Use the component name for system behavior.

• "You configure the server" — not "We recommend configuring" or "The user should configure"
• "The API returns 404" — not "A 404 will be returned"

10. Simple words

Replace	With
utilize	use
facilitate	help
initiate	start
terminate	stop or end
leverage	use
implement	build, add, or write
functionality	feature or behavior
in order to	to
due to the fact that	because
at this point in time	now
prior to	before
subsequent to	after
in the event that	if
it is worth noting that	(delete — just say the thing)

11. No negative framing

State what to do, not what to avoid.

• "Use HTTPS" — not "Don't use HTTP"
• Exception: warnings, known failure modes, and safety-critical instructions.

12. Short paragraphs

2–4 sentences. One topic. Two ideas means two paragraphs.

13. Define or cut jargon

First use: add a brief inline definition. Second use: no definition needed. If a plain equivalent exists, use it throughout.

14. Measure, don't describe

Replace every subjective descriptor with a number or observable fact.

• "fast" → "under 100ms"
• "large" → "over 1GB"
• "improves performance" → "reduces latency by 40%"
• "easy to use" → (delete — let the design show it)

Editing Process

1. Read the full document before changing anything.
2. Apply rules in order, 1 through 14. Earlier rules take priority when they conflict.
3. Never change: code blocks, inline code, commands, variable names, URLs, proper nouns.
4. Do not add content. Cut, simplify, and restructure only.
5. Preserve all headings, lists, tables, and document structure.
6. Return the complete rewritten document. No preamble, no changelog, no commentary.

Long Documents (over 500 words)

Spawn the iceberg-edit agent. Pass it the full document text and the intent string (if provided). Return the agent's output verbatim as the final result.