Nium Wiki Generator

Produce professional-grade, domain-organized project Wiki under the .nium-wiki/ directory.

Core Principle: Generated documentation must be detailed, structured, diagrammed, and cross-linked, meeting enterprise-level technical documentation standards.

Quality Gate for Generated Documentation

MANDATORY: Every piece of generated documentation MUST satisfy the following criteria:

Depth of Coverage

• Provide full context for every topic — never leave bare lists or placeholder outlines
• Write specific, explanatory descriptions that address the WHY and HOW behind each concept
• Supply runnable code examples paired with their expected output (🔴 secrets must be sanitized - see "Secret & Credential Sanitization")
• Call out edge cases, caveats, and common mistakes explicitly

Substantive content: A section has real content if it contains ≥ 3 non-empty, non-heading lines, OR at least one code block, diagram, or table. A heading followed by a single sentence or a bare list does not count.

Structural Conventions

• Organize content with hierarchical headings (H2 → H3 → H4) to form a clear information hierarchy
• Summarize key concepts in tables for scanability
• Illustrate processes and flows using Mermaid diagrams
• Interconnect documents via cross-links

🔴 MANDATORY: Link Path Format

ALL source file links MUST use project-root-relative POSIX paths starting with /. NEVER use file:// URIs, absolute filesystem paths, or OS-specific paths. The IDE/editor may provide file paths as file:///Users/.../project/src/foo.ts — you MUST strip the prefix and convert to /src/foo.ts.

❌ Wrong	✅ Correct	Reason
[foo.ts](file:///Users/x/project/src/foo.ts#L1-L50)	[foo.ts](/src/foo.ts#L1-L50)	Strip file:// prefix + absolute path
[foo.ts](src/foo.ts#L1-L50)	[foo.ts](/src/foo.ts#L1-L50)	Must start with /
[foo.ts](C:\Users\x\project\src\foo.ts)	[foo.ts](/src/foo.ts)	No Windows paths

Conversion rule: Given any absolute path, remove everything up to and including the project root directory name, then prepend /. Example: file:///home/user/my-project/src/core/foo.ts → /src/core/foo.ts.

🔴 MANDATORY: Secret & Credential Sanitization

CRITICAL: NEVER include actual secrets, credentials, API keys, or sensitive information in generated documentation.

MANDATORY sanitization rules:

Scenario	Action	Example
Hard-coded API keys in source	Replace with placeholders	sk_live_abc123 → sk_live_XXXXXXXXXXXX
Database credentials	Redact or use example values	password: "mysecret123" → password: "***REDACTED***"
Private tokens/keys	Mask with descriptive placeholders	TOKEN=secret123 → TOKEN=<your-api-token-here>
Environment vars with secrets	Show safe example values	AWS_SECRET_ACCESS_KEY=xyz → AWS_SECRET_ACCESS_KEY=<your-secret-key>

Sanitization pattern library:

• API keys: sk_live_XXXXXXXX, pk_test_XXXXXXXX, api_key_XXXXXXXX
• Passwords: ***REDACTED***, <your-password-here>
• Tokens: <your-access-token>, <auth-token-here>
• Generic: XXXXXXXX, <secret-value>, <sensitive-data>

Exception: Mermaid diagrams, source file path links, and markdown structure MUST still be preserved unchanged (except for secret removal within code blocks).

Diagram Requirements (at least 2-3 per document)

Content Type	Diagram Type	Condition
System architecture	flowchart TB with subgraphs	always
Request / data flow	sequenceDiagram	always
Lifecycle / state transitions	stateDiagram-v2	only for stateful modules
Class / Interface shape	flowchart LR showing type/module relationships	only when source is read
Module dependencies	flowchart LR	always
Data models / ORM	erDiagram	when project has database/ORM
Module conceptual relationships	mindmap	optional, for abstract module relationships only (NOT file trees)

Diagram diversity: Count ≥ 2 distinct diagram types toward the minimum. Three identical flowcharts do not satisfy the requirement — use flowchart LR, sequenceDiagram, stateDiagram-v2, erDiagram as appropriate for the module.

Note: mindmap is optional and does not count toward the ≥ 2 distinct types requirement. It may supplement but never replace the required diagram types above.

Layout rules: Choose direction by content — TB for hierarchies, LR for flows/dependencies. Use subgraph to group related nodes when count > 6. Apply style color coding to highlight key nodes.

File/directory structure MUST use plain-text tree format (├── └──), NEVER use Mermaid diagrams (including mindmap). Mermaid mindmap is only for showing abstract conceptual relationships between modules, never for file paths or directory trees.

🔴 Mermaid Syntax Safety Rules (MANDATORY — Read Before Every Diagram)

⚠️ HARD REQUIREMENT: Before generating ANY Mermaid diagram, you MUST read refs/mermaid-syntax.md in full. Generating without reading this file is a hard requirement violation.

✅ Hard Rules — parser errors (must fix). ⚠️ Suggestions — best practices.

Category	Rule	Wrong ❌	Correct ✅
✅	subgraph ID must not collide with node ID	subgraph CLI[...]\nCLI[...]	subgraph CL[...]\nCLI[...]
✅	Unescaped quotes in plain labels	A[Config "x" val]	A[Config "x" val] or A["Config \"x\" val"]
✅	Reserved keywords as IDs	class[class]	NodeClass[class] (keywords: class, graph, digraph, subgraph, end, click, style, state, note)
⚠️	Plain labels preferred for simple text	A["Label"]	A[Label]
⚠️	Alphanumeric IDs preferred	Core.1[Core]	Core_1[Core]
⚠️	English subgraph IDs preferred	subgraph 核心层[...]	subgraph Core[...]

Complexity grouping (when nodes > 6):

Node Count	Strategy
≤ 6	Linear — no grouping needed
7-12	subgraph grouping, 2-4 nodes per group
13-20	Layered abstraction (overview + detail)
> 20	Split into multiple diagrams

Example — Grouped vs waterfall:

%% WRONG — narrow waterfall
flowchart TD
    A --> B --> C --> D --> E --> F --> G --> H
%% CORRECT — grouped by phase
flowchart TD
    subgraph Phase1[Phase 1]
        A --> B
    end
    subgraph Phase2[Phase 2]
        C --> D --> E
    end
    Phase1 --> Phase2

🔴 MANDATORY: Source File Back-References

Each section MUST end with links back to the originating source files (see "Link Path Format" above for path rules):

**Source references**
- [cli.ts](/src/cli.ts#L1-L50)
- [index.ts](/src/index.ts#L20-L80)

**Diagram data sources**
- [core/analyzeProject.ts](/src/core/analyzeProject.ts#L1-L100)

🔴 MANDATORY: Source Attribution for Code Block Excerpts

Any code block that is a direct excerpt from a source file (function body, class definition, type definition, import/export statement) MUST carry a source attribution line immediately above the code block. This applies to .ts, .js, .py, .go, .rs, .java, and other language source files.

⚠️ CRITICAL: The attribution line MUST be placed outside the code fence (above the opening ```), using plain text format without any language-specific comment syntax (no //, #, /* */, etc.). The attribution line is plain text, and the Markdown link inside it will be rendered as a clickable link.

✅ CORRECT format:

[Source: cli.ts](/src/cli.ts#L42-L67)
```typescript
const result = cli.parse(process.argv);

**❌ WRONG formats (links will NOT be clickable)**:

```markdown
// Wrong: Inside the code block as a comment — the link won't work
```typescript
// Source: [cli.ts](/src/cli.ts#L42-L67)
const result = cli.parse(process.argv);

// Wrong: Uses comment syntax (//, #, etc.) — renders as code, not text
// [Source: cli.ts](/src/cli.ts#L42-L67)
```typescript
const result = cli.parse(process.argv);

Attribution is **not required** for:

| Content type | Example | Why no attribution |
|---|---|---|
| Usage / call-site examples | `cli.run(['--help'])` | Calling code, not source excerpt |
| Teaching / invented examples | Any code that does not exist in the source | Not in any source file |
| Mermaid / shell / CLI commands | `flowchart TD\n  A --> B` | Not source code |
| Output / runtime results | `// Output: { id: 1 }` | Results, not source |

### 🔴 MANDATORY: Complexity-Scaled Quality Targets

**Quality standards scale with module complexity — not fixed numbers.**

| Module Role | Doc Depth | Code Examples | Diagrams |
|-------------|-----------|---------------|----------|
| core | Comprehensive (use `module.md`) | 5+ | 2+ |
| util / config | Concise (use `module-simple.md`) | 1-2 | 1 |
| test / example | Minimal (use `module-simple.md`) | 1 | optional |

**General rules**: larger source files → longer docs; more exports → more examples; more dependents → more diagrams.

> In incremental mode, these targets are overridden — see [Mode Overrides](#mode-overrides).

### Module Document Sections

Use `module.md` (11 sections) for core modules, `module-simple.md` (6 sections) for util/config/helper modules.

**Full template (`module.md`) — for core modules:**

| # | Section | Content | Lines Target | Diagram |
|---|---------|---------|-------------|---------|
| 1 | **Overview** | Intro + value proposition + architecture role | 2-3 paragraphs | — |
| 2 | **Architecture Position** | Mermaid diagram highlighting module position | — | flowchart TB |
| 3 | **Feature Table** | Features with related APIs | N features | — |
| 4 | **File Structure** | File tree + responsibilities | tree | — |
| 5 | **Core Workflow** | Mermaid flowchart | — | sequenceDiagram |
| 6 | **State Diagram** | ⚡ OPTIONAL — only for stateful modules | OPTIONAL | stateDiagram-v2 |
| 7 | **API Summary** | Overview table + link to api.md (no detailed signatures) | table + link | — |
| 8 | **Usage Examples** | 1-3 examples (first = Quick Start) | 5+ (core) / 1-2 (util) | — |
| 9 | **Best Practices** | Recommended / avoid patterns | recommended/avoid | — |
| 10 | **Design Decisions** | ⚡ OPTIONAL — only for core modules with significant choices | OPTIONAL | — |
| 11 | **Dependencies & Related Docs** | Dependency diagram + cross-links | — | flowchart LR |

**Lightweight template (`module-simple.md`) — for util/config/helper/test modules:**

| # | Section | Content |
|---|---------|---------|
| 1 | **Overview** | 1 paragraph |
| 2 | **API Summary** | Overview table + link to api.md |
| 3 | **Usage Examples** | 1-2 examples |
| 4 | **File Structure** | File tree |
| 5 | **Best Practices** | ⚡ OPTIONAL |
| 6 | **Related Docs** | Cross-links |

**Template selection**: Before generating each module's documentation, run `cd <skill-root> && node scripts/index.cjs analyze-module <module-path> --json` to get structured signals. Use `docScope` as the primary signal — it appears as `"docScope": "core"` in the JSON output:

| `docScope` | Use this template | Lines target | Diagrams |
|---|---|---|---|
| `core` | `module.md` (11-section) | 400+ | 2+ distinct types required |
| `overview` | `overview.md` (5-section) | 80-150 | optional |
| `_index` | `_index.md` only | 30-50 | none |

The `templateRecommendation` and `roleRecommendation` fields are also present in the output and are based on quantifiable metrics but are **overrideable**: your semantic understanding of the module's business role takes precedence.

> Code provides signals. You make the final decision.

### 🔴 Code Examples

Every code example must:

1. **Complete and runnable**: Include import, initialization, invocation, result handling
2. **Cover exported interfaces**: At least 1 example per major exported API
3. **Include comments**: Explain key steps and design intent
4. **Match project language**: Follow language best practices
5. **Tiered examples for core APIs** (minimum 5 examples per core doc): Three levels — basic usage, advanced usage, and error handling — for each major exported function
6. **Sanitized secrets**: NO actual credentials — use placeholders (see "Secret & Credential Sanitization" above)

### Cross-Document Linking
- Every document MUST contain a **"Related Documents"** section at the end
- Module docs should link outward to: architecture position, API reference, dependency graph
- API docs should link back to: parent module, usage examples, type definitions

**Path format rules for "Related Docs" table ("Related Docs" in `module-simple.md` / "Dependencies & Related Docs" in `module.md`)**:
- **Wiki page links**: Use **relative paths** from the current doc's location. E.g., from `modules/badge.md`: `[version]({{ ../api/version.md }})` → resolved to `../api/version.md`
- **Source file references**: Do NOT put source files (`.ts`, `.js`, etc.) in the Related Docs table. Source files belong in **section footers** with absolute paths: `[version.ts](/src/utils/version.ts#L1)`
- **Wrong**: `[version.ts](/wiki/utils/version.md)` — mixes wiki path prefix with source file name
- **Wrong**: `[version.ts](../modules/version.md)` — links to a wiki page, not the source file
- **Correct (source)**: `[version.ts](/src/utils/version.ts#L1)`
- **Correct (wiki page)**: `[API reference](../api/version.md)`

### Facts-First Rule

Before writing any API description, function signature, or export list for a module:

1. Read `.nium-wiki/cache/facts/<module-path-with-slashes-replaced-by-double-underscores>.json`
2. All export names and signatures in the documentation MUST match `exports[]` in the facts file
3. If a symbol is not in `exports[]`, do not document it as a public API. If `exports[]` contains symbols not yet in the document, add them.
4. If the facts file does not exist, run `cd <skill-root> && node scripts/index.cjs analyze-batch <project-root>` before proceeding — this writes facts to `.nium-wiki/cache/facts/`. Do NOT generate documentation without facts.

### Multi-Module Generation Mode

When generating documentation for multiple modules at once using `analyze-batch`:

1. Run `cd <skill-root> && node scripts/index.cjs discover-modules <project-root> --json` to get the full module list
2. Run `cd <skill-root> && node scripts/index.cjs analyze-batch <project-root>` to extract facts for all modules
3. Output one summary table before starting generation:
   - Total modules discovered
   - Modules with `needsReview: true` (list paths and reasons)
   - Estimated documents to generate
4. For modules with `needsReview: true`: pause and list them with their reason (`confidence < 0.3` or `secret detected`). Wait for user confirmation before generating those modules. All other modules proceed automatically.
5. Do NOT output a per-module Exploration Report in Multi-Module Generation Mode — the summary table replaces it.

### Incremental Facts Rule

On patch operations (updating existing documentation after code changes), run this **before Step 1 (Read the baseline) of the Surgical Edit sequence**:

1. Re-read the module's `facts.json` even if the document already exists
2. The facts file is the authoritative source for what the current API looks like
3. The existing document is a starting point for structure, not a source of truth for API signatures

---

## Mode Overrides

> **Applies when**: Running in incremental mode, triggered by the `incremental` pipeline.
> **Priority**: These overrides take precedence over the Quality Gate rules above.
> See [Surgical Edit: Modifying Existing Docs](#surgical-edit-modifying-existing-docs) for the full execution guide.

| Quality Gate Rule | Incremental Mode Behavior |
|---|---|
| core doc ≥ 5 code examples | Add **0–1 example** only when a new API is introduced by the changed source |
| ≥ 2 distinct diagram types | **Do NOT regenerate any diagram** — preserve existing diagrams unchanged |
| Full 11-section `module.md` template | **Patch only the affected section(s)** based on which source files are listed in `triggeredBy` |
| `flowchart LR` for type/module relationships | **Skip** unless the class was modified **and** its source was read |
| API summary must cover all exports | **Only cover exports that changed** |
| core doc ≥ 400 lines | **No minimum** — a 50-line targeted patch is preferable to a 400-line rewrite |
| ≥ 3 source reference links | **Only links related to changed source files** |

---

## Input Classification

Before invoking any CLI commands, parse the user input to determine the execution path:

| InputType | Trigger Phrases | Execution Path |
|-----------|----------------|----------------|
| `FULL` | "generate wiki", "create docs", "rebuild wiki" | Full pipeline — all modules |
| `MODULE_TARGETED` | "generate wiki for X", "update X docs", "upgrade X docs" | Module-level pipeline |
| `MAINTENANCE` | "upgrade wiki", "refresh wiki", "audit docs" | Maintenance pipeline |
| `EXPLORE` | "analyze module X", "explore X" | Read-only analysis, no file writes |

---

## Module-Targeted Generation

> **Applies when**: InputType = `MODULE_TARGETED` (user specifies a specific module).
> **Otherwise**: For `FULL` mode (no module specified, e.g. "generate wiki" / "rebuild wiki"), skip this entire section and follow [Multi-Module Generation Mode](#multi-module-generation-mode) — the summary table there replaces the per-module Exploration Report.

### Step 0 — Path Resolution

Extract the module path from user input:

"generate wiki for src/core/analyzeProject" → src/core/analyzeProject "update modules/auth docs" → modules/auth "explore utils/fileWalker" → src/utils/fileWalker

Normalize all paths relative to the project root.

### Step 1 — Pre-flight Check

```bash
cd <skill-root> && node scripts/index.cjs analyze-module <module-path> --json

Read the returned docScope and roleRecommendation:

docScope: core      →  module.md (11-section, 400+ lines, 2+ diagrams)
docScope: overview   →  overview.md (5-section, 80-150 lines)
docScope: _index     →  _index.md only

Also read the module's facts file (Facts-First Rule):

<project-root>/.nium-wiki/cache/facts/<module-path-with-slashes-as-double-underscores>.json

If missing, run cd <skill-root> && node scripts/index.cjs analyze-batch <project-root> first.

Determine document state:

if wiki file already exists for this module:
    →  EXPLORE_THEN_PATCH (surgical edit, preserve existing content)
else:
    →  EXPLORE_THEN_GENERATE (first-time generation)

Step 2 — Code Exploration (Read-Only, No File Writes)

Read the actual source code — do not rely on file names or structure alone:

read_file: all source files in the module directory (*.ts/*.js, *.py, *.go, *.rs, *.java, *.cs, *.rb, *.php, etc.)
read_file: entry/index file (index.ts, __init__.py, mod.rs, package-info.java, etc.)
read_file: type/interface definitions if present (types.ts, types.d.ts, interfaces/, etc.)

Analyze:

• Function signatures: purpose, parameters, return values, side effects
• Class hierarchies and inheritance
• Data flow paths and state mutations
• Error handling strategies
• Design patterns in use
• 🔴 Secrets detection: identify hard-coded credentials, API keys, tokens

Step 3 — Exploration Report (Output to User, No File Writes)

Display a structured report and await user confirmation before proceeding:

## Module Exploration Report: <module-name>

**Role**: <roleRecommendation>
**Template**: <module.md / module-simple.md>
**State**: <EXPLORE_THEN_GENERATE / EXPLORE_THEN_PATCH>

### Key Findings
- Exports: N functions, M types
- Dependents: N modules depend on this

### Recommended Sections
(see [Module Document Sections](#module-document-sections) for section list, lines targets, and diagram types)

---
Proceed with generation? [yes / no / customize]

This step is mandatory. A confirmation gate prevents generating content before understanding the code. Do not skip to Step 4 without presenting this report.

Step 4 — User Response

Response	Action
yes	Proceed to Step 5 using the recommended template
no	Exit — write nothing, report nothing
customize	Apply user-specified section additions or removals, then proceed

Step 5 — Execution

If incremental returns empty (no code changes detected, but user explicitly specified a module):

Skip incremental dependency computation
Use user-specified module path as the sole target
Do NOT treat as surgical patch (no old doc to compare against)
Resume from Step 1 Pre-flight Check, then proceed to generation

If incremental returns affected docs: use the pipeline's triggeredBy + updateStrength to decide full vs. surgical.

---

Full Decision Tree

User Input
  │
  ├─ "generate wiki" (no module specified)
  │    ├─ .nium-wiki does not exist → init → FULL pipeline (Sections 1–9, + Section 10 if multi-language)
  │    └─ .nium-wiki exists → FULL pipeline (Sections 1–9, + Section 10 if multi-language)
  │         │
  │         ├─ Section 4 runs: build-deps → discover-modules → analyze-batch
  │         │    └─ Follow Multi-Module Generation Mode rules during Section 8 (Content Generation)
  │         │
  │         └─ After Section 4: check project size
  │              ├─ module count > 10 OR source files > 50 OR LOC > 10,000
  │              │    └─ Switch to Progressive Scanning (see "Progressive Scanning for Large Projects")
  │              └─ otherwise → continue full pipeline normally
  │
  ├─ "generate wiki for <module>"
  │    ├─ .nium-wiki does not exist → init → MODULE_TARGETED
  │    └─ .nium-wiki exists
  │         ├─ incremental has changes → affected docs from pipeline
  │         └─ incremental is empty  → use user-specified module as target
  │    → Exploration Report → User confirms → Generate
  │
  ├─ "upgrade <module> docs"
  │    └─ MODULE_TARGETED + force full regeneration
  │
  ├─ "analyze module X"
  │    └─ Run `cd <skill-root> && node scripts/index.cjs analyze-module <module-path> --json` — JSON signals only, no wiki files written
  │
  └─ "refresh / upgrade wiki" (no module)
       └─ MAINTENANCE → audit → regenerate failing docs

---

Workflow

1. CLI Commands Quick Reference

🔴 Execution context: Skill CWD is not guaranteed to be the skill root across Coding Agents, so scripts/index.cjs cannot be resolved from the default CWD. Every runnable example is written as cd <skill-root> && node scripts/index.cjs ... — the Agent MUST cd in first, then pass <project-root> as an argument.

<skill-root> is the directory containing this SKILL.md file. Resolve it from this file's absolute path, do not guess from agent-specific conventions.

# Signatures (paths shown without the `cd <skill-root> &&` prefix for readability)
node scripts/index.cjs init <project-root> --lang <code>              # Initialize .nium-wiki directory (lang: zh/en/ja/ko/fr/de)
node scripts/index.cjs build-deps <project-root>                      # Build import/require dependency graph
node scripts/index.cjs discover-modules <project-root>                # Discover all modules via import graph + directory scan
node scripts/index.cjs analyze-batch <project-root> [--force] [--min-confidence <n>]  # Extract facts for all modules
node scripts/index.cjs analyze-module <module-path> [--json]          # Analyze one module: classify role, recommend template
node scripts/index.cjs incremental <project-root> [--no-commit] [-v]  # Full pipeline: diff → deps → doc-index → affected docs
node scripts/index.cjs diff-index <project-root>                      # Detect file changes (--no-update to skip hash write)
node scripts/index.cjs build-index <project-root>                     # Build source ↔ doc mapping index
node scripts/index.cjs generate-sidebar <wiki-path> [--all]           # Generate sidebar.json for all language directories
node scripts/index.cjs audit-docs <wiki-path> [--verbose|--json|--mermaid-strict|--role <role>]  # Check doc quality
node scripts/index.cjs serve <wiki-path>                              # Start docsify server

For detailed usage, see cd <skill-root> && node scripts/index.cjs --help

⚠️ Path argument convention: This document uses four distinct path notations — do not confuse them:

Notation	Meaning
<skill-root>	The directory containing this SKILL.md file. Always cd here before invoking node scripts/index.cjs ... so the relative path scripts/index.cjs resolves regardless of the Agent's default CWD
<project-root>	Absolute path of the user's current workspace root — the directory the user is working in (e.g. /Users/alice/repos/my-app). Passed as a command argument, NOT as CWD
<module-path>	Project-root-relative path to a single module (e.g. src/core/analyzeProject). Used only with analyze-module
<wiki-path>	Path to the .nium-wiki directory, usually <project-root>/.nium-wiki. Used with generate-sidebar, audit-docs, serve, i18n

The Agent is responsible for substituting every placeholder with a real value before executing. Do NOT pass the placeholder string literally, and do NOT pass . — . would resolve against an unpredictable CWD depending on the host Agent.

2. Language Detection (MANDATORY)

⚠️ CRITICAL: This step must be completed BEFORE any other operation.

Before running any CLI commands or generating any documentation:

1. Check if .nium-wiki/config.json exists
2. If exists: Read the language field — this is the primary documentation language and the source of truth
3. If not exists: You will set it when running init --lang <code> (determine from project's natural language + user conversation language)

Rule: The language field in config.json is the only authoritative source for documentation language. Do NOT infer language from source code comments, README, file names, or conversation context.

2.1 Language Conflict Resolution

🔴 CRITICAL: Never modify config.json directly via file write or text replacement. Use the following procedures instead:

Scenario	Action
Config exists, user wants to add a secondary language (e.g. config=en, user wants to also generate zh)	Run cd <skill-root> && node scripts/index.cjs init <project-root> --lang zh — appends zh as a secondary language to config
User wants to change the primary language (e.g. config=en, user wants zh as primary)	Run cd <skill-root> && node scripts/index.cjs init <project-root> --lang zh --force — overwrites primary language to zh
User wants to generate docs in a language already in config	No config change needed — run cd <skill-root> && node scripts/index.cjs incremental <project-root> directly

Why: Direct file edits to config.json bypass the CLI's validation and can corrupt the JSON structure. Always go through the CLI.

3. Language Configuration

Read .nium-wiki/config.json and extract the language setting. Format is slash-separated: the first language is the primary language (e.g. zh, en, zh/en).

• Generate all primary documentation in the primary language to .nium-wiki/wiki/.
• If secondary languages are configured (e.g. zh/en means primary=zh, secondary=en), after primary docs are written, translate all wiki documents into wiki_{lang}/ directories (e.g. .nium-wiki/wiki_en/). See Section 10 for details.

Convention: wiki/ = primary language, wiki_{lang}/ = secondary language. The translated directory must mirror the exact same structure and filenames as wiki/.

🔴 IMPORTANT: Single-language output only. Templates contain bilingual headings (e.g. ## Architecture Preview / 架构预览) for reference purposes only. When generating documentation, output only the primary language. Do NOT mix languages or copy the English / 中文 format into the output.

• If language is en: headings should be ## Architecture Preview, NOT ## Architecture Preview / 架构预览
• If language is zh: headings should be ## 架构预览, NOT ## Architecture Preview / 架构预览

4. Project Analysis (Deep)

Run the following commands to build the dependency graph, discover modules, and extract facts:

cd <skill-root> && node scripts/index.cjs build-deps <project-root>
cd <skill-root> && node scripts/index.cjs discover-modules <project-root>
cd <skill-root> && node scripts/index.cjs analyze-batch <project-root>

build-deps is auto-triggered by discover-modules and analyze-batch if dep-graph.json is missing — you can skip it if the graph is already up to date.

1. Identify tech stack: Check dependency manifests (e.g. package.json, requirements.txt, go.mod, Cargo.toml, pom.xml, etc.)
2. Find entry points: Locate main source files (e.g. src/index.ts, main.py, main.go, main.rs, src/main/java/App.java, etc.)
3. Identify modules: Use discover-modules output — it merges import-graph discovery with directory scan for full coverage
4. Find existing docs: README.md, CHANGELOG.md, etc.

5. Deep Code Analysis (CRITICAL)

IMPORTANT: For every module, read the actual source code — do not rely on file names or directory structure alone:

1. Read source files: Open key files with read_file tool
2. Parse semantics: Determine what the code does, not merely how it is organized
3. Capture details:
   • Function signatures: purpose, parameters, return values, side effects
   • Class hierarchies and inheritance chains
   • Data flow paths and state mutations
   • Error handling strategies
   • Design patterns in use
   • 🔴 Secrets detection: Identify hard-coded credentials, API keys, tokens, and sensitive data that need sanitization
4. Map relationships: Module dependencies, call graphs, data flow
5. Flag complexity hotspots: Functions with deep nesting (> 4 levels), high branching (> 10 conditions), or excessive length (> 100 LOC). Document these in module docs with logic explanations and refactoring suggestions.

6. Change Detection

Use the automated incremental pipeline to detect changes and compute the precise list of affected docs in one step:

cd <skill-root> && node scripts/index.cjs incremental <project-root> [--no-commit] [-v]

This runs the full pipeline: diff-index → build-deps → build-index → transitive-impact → doc-dep analysis. It outputs:

• Which source files changed (+added, ~modified, -deleted)
• Which wiki docs need regeneration (with reason: source_changed, dep_changed, doc_dep_changed, inferred)
• Which docs will be deleted
• Which docs are preserved (unchanged)

If wiki doesn't exist yet: the pipeline automatically falls back to full-generation mode.

IMPORTANT: Always run incremental before generating, not diff-index alone. diff-index only detects source changes — it does NOT map them to wiki docs. After incremental completes, always check i18n sync status (see Section 10) before declaring the update done.

7. Target Docs (resolved by the pipeline above)

The incremental command in Section 6 already resolves this. Each affected doc includes:

• docPath: relative wiki path (e.g. modules/core/source-index.md)
• reason: why it needs updating
• triggeredBy: source files that triggered the update

Manual fallback (if pipeline not available): Read .nium-wiki/cache/doc-index.json → sourceToDoc field. If a changed source file has no entry, infer by naming convention: src/fooBar.ts → modules/foo-bar.md, and nested paths: src/core/analyzeProject.ts → modules/core/analyze-project.md.

8. Content Generation

🔴 Language: use language from .nium-wiki/config.json — see Section 3. Do NOT infer from source code or conversation.

Generate content adhering to the quality gate defined above:

8.1 Template Selection Rules

Read the named template file from templates/ before writing each doc. Not all templates are needed for every project — apply these rules:

Doc	Template file	When to generate	Notes
index.md	templates/index.md	always	—
architecture.md	templates/architecture.md	always	—
modules/<name>.md	templates/module.md (core) or templates/module-simple.md (util/config/helper/test)	always (choose by docScope)	Module docs only contain an API overview table + link. Detailed signatures and type definitions belong exclusively in api.md.
<domain>/_index.md	templates/_index.md	one per domain directory under wiki/	Short overview + architecture diagram + sub-module table. No detailed API docs.
getting-started.md	templates/getting-started.md	project has install steps OR is a library/framework	—
api/<name>.md	templates/api.md	project exports programmatic APIs (functions/classes/types)	Single source of truth for all API signatures/types. Mark @deprecated with migration guidance. Include parameter constraints where applicable (e.g. "must not be empty", "range 0-100").
doc-map.md	templates/doc-map.md	module count >= 5	—

8.2 Source Links

Attach navigable source links next to documented symbols:

### `functionName` [📄](/src/file.ts#L42)

9. Save

• Write wiki files to .nium-wiki/wiki/
• Sanitize link paths and build indexes after wiki files are written:

cd <skill-root> && node scripts/index.cjs sanitize-links <project-root>
cd <skill-root> && node scripts/index.cjs build-index <project-root>
cd <skill-root> && node scripts/index.cjs diff-index <project-root>  # --no-update to skip hash write

sanitize-links scans all wiki .md files and converts any file:// absolute paths to project-root-relative paths. MUST run before build-index. build-index scans source path links in wiki files to build cache/doc-index.json (source ↔ doc mapping for incremental updates). diff-index (without --no-update) is called last so the hash snapshot reflects the final state.

• Refresh meta.json timestamp
• 🔴 MANDATORY — Generate sidebar:

cd <skill-root> && node scripts/index.cjs generate-sidebar <wiki-path> --all

This generates sidebar.json for all language directories. It is idempotent — if sidebar.json already exists it will be skipped. If a legacy _sidebar.md exists it will be migrated automatically. This step is mandatory after every wiki generation — the preview server and all modern tooling depend on sidebar.json. Do NOT skip it.

10. Multi-language Translation

Applies to both full generation and incremental updates. Every time wiki/ is modified, secondary language files in wiki_{lang}/ that correspond to changed docs must be kept in sync — do not leave them stale.

Skip this step if language contains only one language.

10.1 Build Translation Task List

Run cd <skill-root> && node scripts/index.cjs i18n status <wiki-path> to get the sync report. Extract every file marked Missing or Outdated into an explicit checklist (e.g. ❌ [Missing] index.md, ⚠️ [Outdated] architecture.md).

You MUST translate every file in this list — no exceptions, no skipping.

Incremental mode: If this is a partial update (incremental pipeline detected changes), only translate files that are Outdated or Missing — do NOT re-translate all Synced files. Full generation mode: Translate all Missing files (Outdated may not exist yet since memory has not been populated).**

10.2 Translate Files One by One

🔴 MANDATORY: Process EVERY file in the checklist sequentially.

For each file:

1. Read the primary wiki file from wiki/
2. Translate content to the target language
3. Write to wiki_{lang}/ with identical path and filename (e.g. wiki/core/auth.md → wiki_en/core/auth.md)
4. Preserve unchanged: all Mermaid diagrams, code blocks (EXCEPT sanitize any secrets/credentials if found), source path links, and markdown structure
   • Secret sanitization exception: If code blocks contain secrets/credentials, sanitize them using the rules from the "Secret & Credential Sanitization" section

After each file, report progress: ✅ [3/17] wiki_en/core/_index.md

Batching rule: If the file count exceeds 10, translate in batches of 5. After each batch, report progress and continue immediately — do NOT stop or ask the user unless you hit a context limit. If you must stop, clearly list the remaining untranslated files so the user can say "continue" to resume.

10.3 Finalize

After ALL files are translated:

cd <skill-root> && node scripts/index.cjs i18n sync-memory <wiki-path>

Run cd <skill-root> && node scripts/index.cjs i18n status <wiki-path> again to verify all files show as Synced. If any files are still Missing or Outdated, go back and translate them.

Delete rule: When deleting any file from wiki/ (e.g. because the source file was deleted), you MUST also delete the corresponding file from ALL wiki_{lang}/ directories.

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Surgical Edit: Modifying Existing Docs

Applies when: Updating 1-3 existing wiki documents (incremental pipeline result), not full generation.

When an existing doc already exists, your goal is to patch the minimum surface area, not regenerate the full file. Every line you leave untouched is a line that does not need to be reviewed, diffed, or reverted.

🔴 Quality Gate Disabled During Incremental Updates

⚠️ CRITICAL: When running in incremental mode (triggered by incremental pipeline), the global Quality Gate rules above do NOT apply to existing docs being surgically patched. Applying those rules blindly is the primary cause of oversized diffs and unnecessary rewrites.

See Mode Overrides for the full table of Quality Gate rule overrides in incremental mode.

updateStrength from the incremental pipeline controls patch depth:

updateStrength	Meaning	Action
full	Function signature changed OR module role changed	Full regeneration of this doc
incremental	Transitive/dep/doc-dep propagation	Surgical patch only — no quality gate, no template

Rule: If the pipeline says updateStrength: incremental for a doc, treat it as a targeted patch — update only the section that mentions the triggering source, leave everything else untouched.

Mandatory Steps (Execute in Order)

Never start from the template when updating an existing doc.

Step 1 — Read the baseline

• read_file: the existing wiki doc (read-only, this is what you are preserving)
• read_file: all source files that triggered the update (from incremental output)

Step 2 — Evaluate match degree Cross-read the existing doc against the changed source files. Answer:

• Which sections of the existing doc directly correspond to the changed code?
• Which sections are completely unaffected?
• What is your overall match degree?

Step 3 — Decide strategy by match degree

Match degree	Signals	Action
≥ 80%	Internal change only (comment, variable rename, refactor); function signatures unchanged; core topics not touched	Default: PRESERVE — update version footer only, do not touch the body. If no version footer exists, create one (a single line).
40–80%	One function's behavior changed; new export added; file structure changed	Patch only the affected sections — leave everything else untouched
< 40%	Function renamed or signature changed; module role changed; multiple sections invalidated	Full regeneration of this document

Step 4 — Write the patched doc

• Output MUST be a minimal diff from the original — significantly smaller than a full regeneration
• Do not use the module template as the starting point for an existing doc

Step 5 — Self-verify Before finalizing, mentally check: does the new file differ from the original in anything beyond the source-change-affected sections, newly-added sections, and now-incorrect sections? If yes, you are rewriting too much — restore the preserved sections.

Principle 1 — Preservation Priority

Unless the source has actually changed, the following MUST be preserved exactly as-is:

Content type	When to update
Accurate description paragraphs	Never (unless source logic changed)
Correct code examples	Never (unless the code itself changed)
Mermaid diagrams	Never (unless the underlying flow/calls changed)
File structure tree	Only when files were added/removed
API summary table	Only when function signatures changed
Best practices section	Never (unless the module logic changed)
Cross-links	Only when linked docs were moved/renamed

Principle 2 — Change Scope Isolation

Before editing, write down the minimum scope:

Change type → Minimum doc impact

1. Function logic changed (signature unchanged)
   → Update only that function's description paragraph
   → Code example only if the behavior changed in a user-visible way (callers must change)
   → If change only affects internal call chains, not external callers: update version footer only
   → Do NOT rewrite other functions' descriptions

2. New exported function added
   → Append one row to the API summary table
   → Add one usage example (optional)
   → Do NOT rewrite existing examples

3. File added/removed
   → Update the File Structure tree
   → Do NOT regenerate Architecture Position diagram (unless the module's position actually changed)

4. Bug fix (doc described old/wrong behavior)
   → Fix only the affected paragraph
   → Do NOT restructure the entire section

Principle 3 — When in Doubt, Don't Touch

🔴 PRESERVE is the default at ≥ 80% match. If a paragraph is accurate (correctly describes the code) and not outdated (code hasn't changed in a way that contradicts it), leave it alone. Rewriting for style, phrasing, or "cleaner" expression is always wrong — a smaller diff beats a prettier paragraph. The burden of proof is on rewriting, not on preserving.

Bug-Level Violations (Anti-Patterns + Hard Rules)

Treat the following as bugs, not stylistic choices:

Violation	Why it's wrong
Starting from the module template when patching an existing doc	Creates massive diff for no reason; contradicts "read the baseline first"
Full regeneration when function signature is unchanged	Internal implementation change ≠ doc invalidation
Rewriting a paragraph that remains accurate	Accurate = leave alone; "improving" wording yields diff noise
Rewriting code examples whose code has not changed	Even correct examples get rephrased
Regenerating a Mermaid diagram whose source has not changed	Diagram was fine before
Reordering sections	Changes diff noise, no factual benefit
Rephrasing the file structure tree	Only update when structure changed
Writing to an existing doc without reading it first	You can't preserve what you haven't read

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Output Structure

🔴 MANDATORY: Domain-Based Directory Hierarchy (No Flat Layout!)

Organize by business domain, not flat modules/ directory.

Directory naming rule: All wiki directory names MUST use lowercase + hyphens (kebab-case), e.g. core/, language-handlers/, utils/. Never use PascalCase or camelCase.

.nium-wiki/
├── config.json
├── meta.json
├── cache/
├── wiki/                              # Primary language docs
│   ├── index.md                    # Project homepage
│   ├── architecture.md             # System architecture
│   ├── getting-started.md          # Quick start
│   ├── doc-map.md                  # Document relationship map
│   │
│   ├── <Domain-1>/                 # Business domain 1
│   │   ├── _index.md              # Domain overview
│   │   ├── <Sub-domain>/          # Sub-domain
│   │   │   ├── _index.md
│   │   │   └── <module>.md        # 400+ lines
│   │   └── ...
│   │
│   ├── <Domain-2>/                 # Business domain 2
│   │   └── ...
│   │
│   └── api/                        # API reference
├── wiki_en/                           # Secondary language (if configured)
│   ├── index.md                    # Same structure as wiki/
│   ├── architecture.md
│   └── ...

Automatic Domain Discovery

Infer business domains from the project's directory structure, package boundaries, and import graph. Group modules that share a cohesive responsibility into the same domain directory. Each domain MUST contain:

File	Description
_index.md	Domain overview, architecture diagram, sub-module list
Sub-domain dirs	Related modules grouped by function
Each document	Depth scales with module role — see Complexity-Scaled Quality Targets

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Progressive Scanning for Large Projects

When module count > 10, source files > 50, or LOC > 10,000, switch to Progressive Scanning:

1. Prioritize modules — entry points (weight 5) > dependents (4) > has docs (3) > code size (2) > recently modified (1)
2. Generate 1-2 modules per batch — depth scales with complexity
3. Track progress in cache/progress.json — record completed/pending modules and current batch number
4. After each batch — run cd <skill-root> && node scripts/index.cjs audit-docs <wiki-path> --verbose --mermaid-strict, report results to user, then prompt:
   • "continue" — next batch
   • "audit docs" — re-run validation
   • "regenerate <module>" — redo a specific module
   • If --mermaid-strict reports errors: fix them before continuing — Mermaid syntax errors degrade the diagram catalog silently and accumulate technical debt.
5. Resume — when user says "continue wiki generation", read cache/progress.json and pick up where you left off

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Documentation Upgrade & Maintenance

When existing wiki docs are outdated or below quality gate, use one of these strategies:

Strategy	When to Use	User Command
full_refresh	Large version gap or poor overall quality	"refresh all wiki"
incremental_upgrade	Many modules, want to keep existing content	"upgrade wiki"
targeted_upgrade	Only specific modules need attention	"upgrade <module> docs"

Execution: scan existing docs with cd <skill-root> && node scripts/index.cjs audit-docs <wiki-path> --mermaid-strict, generate an upgrade report, then re-generate failing docs batch by batch. Always include --mermaid-strict so that Mermaid syntax errors block the upgrade and prevent bad diagrams from entering the wiki.

Version footer — append to every generated document: *Generated by [Nium-Wiki v{{ NIUM_WIKI_VERSION }}](https://github.com/niuma996/nium-wiki) | {{ GENERATED_AT }}*

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Finalization Checklist (MANDATORY — Run After Every Generation)

Applies after every wiki generation: full pipeline, module-targeted, incremental, or surgical patch. This checklist is the last step of every execution path. Do not skip any item.

• cd <skill-root> && node scripts/index.cjs generate-sidebar <wiki-path> --all → Generates sidebar.json for all language directories. Idempotent — safe to run multiple times. → Migrates legacy _sidebar.md to sidebar.json automatically if encountered. → ⚠️ Do NOT skip: the preview server and modern tooling depend on sidebar.json.

• cd <skill-root> && node scripts/index.cjs i18n sync-memory <wiki-path> (if multi-language) → Updates translation memory so subsequent runs show accurate sync status.

• cd <skill-root> && node scripts/index.cjs audit-docs <wiki-path> --mermaid-strict (full generation only) → Validates all Mermaid diagrams. Mermaid errors block the run — fix them before declaring done.

Rule: These finalization steps must run after all wiki content is written and after all translation files are updated. They are not optional cleanup — they are part of the generation contract. (read version from scripts/version.json — version field)