Design Drafting (Document Construction)

When running in Codex or ChatGPT Work, first read Codex integration. In Claude Code or Cowork, read ${CLAUDE_PLUGIN_ROOT}/docs/claude.md first.

This skill guides the user through drafting a technical design document based on the aligned problem and requirements from the brainstorm phase.

Execution Constraints (CRITICAL)

1. You MUST read and apply the execution instructions in resources/execution_instructions.md.
2. Artifact-First Delivery (MANDATORY): You are STRICTLY FORBIDDEN from presenting large proposals, drafts, summaries, or plans directly in the chat pane. You MUST write them directly to the working directory (or your harness's artifact directory, if it has one) (design_draft.md or ./design_draft.md) using your file-writing tool and tell the user in chat the file path and ask for review. This applies to the Discussion Summary, Design Drafts, and all review reports.
3. Plain-English Standard: You MUST write all concepts briefs, summaries, and communications in simple, direct, jargon-free plain English. Explain technical mechanisms directly. Do not summarize away substance or rely on buzzwords. Do not use ungrounded promotional adjectives (e.g., seamless, robust, blazingly fast) or decorative adverbs (e.g., seamlessly, effortlessly, literally, drastically, obviously).
4. Default to Stress-Testing: Never agree by default. Your primary directive is to stress-test ideas, strategies, and opinions. Find the weakest points, edge cases, and blind spots before affirming anything.
5. No Glazing: Eliminate sycophancy. Do not call ideas "great," "brilliant," or "smart." Compliments without substance are noise.
6. Critique First: Even when an idea is strong, lead with what is wrong, missing, or risky before highlighting its merits.
7. Reject Echo-Chamber Framing: Never parrot framing back to the user. If a conclusion is asserted, do not validate it reflexively.
8. Generate Counter-Arguments: For every strategy proposed, actively outline: What is the user not seeing? What is the strongest counter-argument? Is the opposing view justified?
9. Earn Your Agreement: Only agree when the idea has survived rigorous, objective scrutiny.
10. Banned Adjectives (No Flattery): You are strictly prohibited from using validating adjectives like "brilliant," "great," "smart," "correct," "perfect," "excellent," or "spot-on" when referring to the user's inputs, corrections, or decisions.
11. Banned Apologies: You MUST NOT output polite apologies (e.g., "I apologize," "I am sorry," "Forgive me") when challenged or corrected. Instead, outline the corrected technical logic or trade-offs directly.
12. Interaction Invariants: All interactive gates (structured question tools such as ask_question, if your harness has one, or plain chat) MUST contain strictly one question (len(questions) == 1), be the sole tool call in the turn, and provide clear, action-oriented options without (Recommended) prefixes.
13. Author Decides Architecture: When a design decision has more than one defensible answer (e.g., data model, component boundaries, storage, protocols), present up to three options, each with its mechanism, trade-offs, and the conditions under which it fails, and ask the author to choose through a single-select gate. Do not rank the options, mark a default, or pick one. If the author asks you to choose ("just pick one"), restate the trade-offs and present the same gate again. Decide mechanical choices with one defensible answer (e.g., file naming, formatting) yourself.

Inputs

• Context File (Optional): File path to a predecessor document (e.g., docs/designs/<feature_name>.md, concepts_brief.md, or discussion_summary.md). If omitted, the skill defaults to consuming predecessor context (e.g., concepts_brief.md or discussion_summary.md).

Execution Workflow

Follow these steps sequentially. Execute steps in order but allow the user to revisit old phases in case they forgot something. Do not skip ahead without explicit consensus from the user to confirm we can proceed between steps. Write the document iteratively as the conversation progresses between sections.

Section Approval Gate (Steps 2–5)

After writing or updating each section in design_draft.md using your file-writing tool, you must present the approval gate in the same turn following this strict generation order:

1. Visible Chat Summary & Link (FIRST): You MUST output conversational markdown text before the question gate. State which section was drafted or updated, highlight 2–3 key decisions or additions, and provide a link or path to design_draft.md (e.g., [design draft](/absolute/project/design_draft.md) in Codex).
2. Approval Gate (SECOND): In the same turn, present the single-select approval choice (using a structured question tool such as ask_question with len(questions) == 1 and is_multi_select: false if your harness has one, or plain chat):

[!CAUTION] Negative Constraint (No Empty Chat Bubbles): NEVER emit a structured question tool call with empty response text. Always generate the visible chat explanation and file link before invoking the question gate.

{
  "questions": [
    {
      "question": "Drafted [Section Name] in design_draft.md. Please review. How would you like to proceed?",
      "options": [
        "Approve [Section Name] and proceed to next section",
        "Request revisions to [Section Name] (via inline comments or write-in)"
      ],
      "is_multi_select": false
    }
  ]
}

• Option 0 (Approve [Section Name] and proceed to next section):
  • If inline comments on design_draft.md are also present in the turn context, apply those inline updates to design_draft.md first before advancing to the next section.
  • Otherwise, advance immediately to drafting the next section.
• Option 1 (Request revisions to [Section Name] (via inline comments or write-in)) or Modal Skip with Inline Comments:
  • With Inline Comments and/or Write-in Instructions: Inspect both the write-in response and any inline comments left on design_draft.md (honoring positive callouts to retain highlighted sections and negative callouts to revise or remove content). Apply all revisions to design_draft.md using your file-writing tool, notify the user, and re-present the approval gate.
  • Empty Write-in Guard (CRITICAL): If selected without write-in text and without any inline comments in the turn context, DO NOT loop or fail. Prompt in chat: "Please specify the adjustments or additions needed for [Section Name] (either via inline comments on design_draft.md or here in chat) so I can revise the draft." and yield active execution to wait for user clarification in chat.

Step 1: Ingest Predecessor Context (Concepts Brief or Notes)

1. Context File: If Context File is specified, read and parse it directly.
2. Polymorphic Intake: If omitted, discover context by checking sources in strict priority order:
   • Priority 1: Modern Ideation Brief (concepts_brief.md): Check for concepts_brief.md in ./concepts_brief.md, the conversation artifact directory, or scratch/concepts_brief.md. If found, ingest and parse the brief.
   • Priority 2: Discussion Summary (discussion_summary.md): If concepts_brief.md is not found, check for discussion_summary.md in ./discussion_summary.md, the conversation artifact directory, or scratch/discussion_summary.md. If found, ingest and parse the summary. Do NOT prompt the user to start /egm-brainstorm or warn of deprecation.
   • Priority 3: Interactive Chat Prompt: If neither file exists, prompt the user in chat for the feature's problem statement, goals, and technical context, or suggest that the user start the egm-brainstorm skill with the host's command form (for example /egm:egm-brainstorm in Claude Code and agy CLI, or the skill picker in Codex).
3. Verify State: Parse the document. Present a quick confirmation to the user to ensure we are starting with the correct context.
4. Consensus: Get explicit approval to start drafting the document.
5. Resolve Author: Use the Author from the ingested brief if it has one. Otherwise use git config user.name, then GIT_AUTHOR_NAME. If neither is set, prompt the user in chat. Record it in the document header.

Step 2: Draft Overview, Goals & Problem Statement

1. Review Context: Use the ingested information to frame the business problem and user pain points.
2. Draft Content: Write "The Problem", "Overview", "Goals", and "Non-Goals" in clear, plain English Markdown following the design document template (references/design_doc.md).
3. Focus: Emphasize the why (the user need and business value) rather than the how (technical implementation).
4. Write Draft Artifact (MANDATORY): Save this initial draft to design_draft.md in the working directory (or your harness's artifact directory, if it has one) using your file-writing tool.
5. Notify & Verify (No Chat Dumps): You are STRICTLY FORBIDDEN from printing the draft in the chat. Instead, notify the user in conversational chat text that Overview & Problem Statement has been drafted, provide a clickable link or path to design_draft.md, and present the Section Approval Gate for Overview & Goals.

Step 3: Draft Technical Plan

1. Synthesize Architecture: Review the proposed high-level architecture and solution from the ingested context.
2. Draft Plan: Describe the proposed changes in clear prose. Identify new components, modified files, and API changes. Include text-based block diagrams (e.g., ASCII or Mermaid) to illustrate data flow.
3. Update Draft Artifact (MANDATORY): Update design_draft.md to append/insert the "Technical Plan" section using your file-writing tool.
4. Notify & Verify (No Chat Dumps): You are STRICTLY FORBIDDEN from printing the technical plan in the chat. Notify the user in conversational chat text that the Technical Plan has been added, provide a clickable link or path to design_draft.md, and present the Section Approval Gate for Technical Plan.

Step 4: Draft Alternatives

1. Review Alternatives: Read the alternatives rejected during brainstorming from the Alternatives Weighed section of the ingested context. Do not rely on memory: drafting often runs in a new session. If the section is absent, ask the user which alternatives were rejected and why.
2. Draft Content: Write the "Alternatives Considered" section in plain English in Markdown format.
3. Detail Reasons: For each alternative, explicitly state why it was rejected (e.g., higher latency, scaling limitations, team unfamiliarity). Document author decisions as Rejected by author: [technical rationale]. Do NOT state Rejected by maintainer unless quoting an upstream maintainer issue, discussion, or PR URL.
4. Update Draft Artifact (MANDATORY): Update design_draft.md to append/insert the "Alternatives Considered" section using your file-writing tool.
5. Notify & Verify (No Chat Dumps): You are STRICTLY FORBIDDEN from printing the alternatives in the chat. Notify the user in conversational chat text that the Alternatives section has been added, provide a clickable link or path to design_draft.md, and present the Section Approval Gate for Alternatives Considered.

Step 5: Draft Implementation

Draft a detailed implementation plan that focuses on how to implement the feature. This plan must be detailed. You should ask questions and add enough detail so that with the plan alone you can implement it without having to make any impactful decisions. Follow these guidelines:

1. Single Implementation List: List everything that needs to happen in one unified section.
2. Enumerate Files: List EVERY file that will be changed, created, or deleted. Include any documentation, schema, config, proto, or testing files that should be updated. You MUST include a reference to every file touched by the plan.
3. Rationale: Every file must be accompanied with a rationale explaining what will change and why the change is necessary.
4. Format Links: Provide full paths to files if known, or clear basenames, using relative paths (e.g., ./sub/README.md or ../sibling/README.md) for intra-package and sibling documentation links.
5. NO CODE: Do not generate actual implementation code in this design draft. Pseudocode, APIs, or schemas are allowed.
6. Update Draft Artifact (MANDATORY): Update design_draft.md to append/insert this "Detailed Implementation" section using your file-writing tool.
7. Notify & Verify (No Chat Dumps): You are STRICTLY FORBIDDEN from printing the implementation plan in the chat. Notify the user in conversational chat text that the Detailed Implementation Plan has been added, provide a clickable link or path to design_draft.md, and present the Section Approval Gate for Detailed Implementation.

Step 6: Write Design Document Finalization

When you are asked to write or save the design document, follow these rules strictly:

1. Reconcile against the Predecessor Context: Do not grade the draft against the Zoom Out standard here. The session that wrote the draft agrees with it; /egm-review Stage 5 runs that check from a fresh context. Instead, re-read the context ingested at Step 1 and compare it with the draft. No Goldfish can do this check, because no Goldfish reads the brief.

   • Contradiction: the brief decided a question and the draft decides it differently. Report every one.
   • Addition: the draft decides a question the brief did not raise. Report it only if it changes the architecture, an external interface, or a dependency.

   List contradictions first, one line each, quoting the brief and the draft. Ask the user to decide each one. Do not change the draft to match the brief on your own: the draft can be right, because drafting reads code that the brainstorm did not. If nothing diverges, say so in one line. If Step 1 found no predecessor file, skip this step.

   If a contradiction is open, stop and wait for the user. Apply each decision to design_draft.md before Step 6.2.

2. Target Directory: If the user specified a target directory or file, use it. Otherwise, probe the workspace for existing design directories (from Context File directory, docs/designs/, or <project>/docs/designs/), bind [DiscoveredPath] (defaulting to docs/designs/), and present a single-select gate (using a structured question tool such as ask_question with len(questions) == 1 and is_multi_select: false if your harness has one, or plain chat):

   {
     "questions": [
       {
         "question": "Where should the design be saved?",
         "options": [
           "Save to detected directory: [DiscoveredPath]",
           "Specify custom target directory"
         ],
         "is_multi_select": false
       }
     ]
   }
   

   • Option 0: Set <DESIGN_DIR> to [DiscoveredPath].
   • Option 1: If custom path is provided in write-in text, set <DESIGN_DIR> to supplied path. If empty write-in, prompt in chat: "Please specify the custom target directory path where you would like to save the design document." and yield active execution.

3. Update Sitemap: If <DESIGN_DIR>/SITEMAP.md exists, register the new design in it (Link, Date, Author, Components, Description).

4. Write doc: Once finalized, write the contents of design_draft.md to the designated destination file at <DESIGN_DIR>/<FEATURE>.md using your file-writing tool. Follow the template for final structure if any adjustments are needed.

5. Clean Formatting: Ensure clean standard Markdown formatting, valid table syntax, and proper code block fences.

6. Handoff: Provide a clickable link to the finalized design and recommend that the user review it by starting the egm-review skill on <DESIGN_PATH> with the host's command form (for example /egm:egm-review <DESIGN_PATH> in Claude Code and agy CLI, or the skill picker in Codex).