Sys Indexing Directories

Directory Indexer

Generate or update index.md files — yellow pages for directories.

Principles

1. List what exists — Names and links only
2. No judgment — No status, flags, or inference
3. Hierarchical nav — ↑ parent · → related
4. Docs only — No code files (separate code-mapper skill)
5. Skip terminal directories — No index.md in directories with no subdirectories

Excludes

Directories: node_modules, .git, .venv, __pycache__, src, lib, dist, build, vendor

Files: *.py, *.js, *.ts, *.jsx, *.tsx, *.go, *.rs, *.java, *.rb, *.php, *.c, *.cpp, *.h, *.css, *.scss, *.json, *.yaml, *.yml, *.toml, *.lock, *.sum

Directory Types

Threads Structure

threads/
├── index.md
├── marketing/
│   ├── index.md
│   └── {thread_name}/
│       ├── 1-input.md        ← source for index entry (frontmatter)
│       ├── 2-hypothesis.md
│       ├── 3-implication.md
│       ├── 4-decision.md
│       ├── 5-actions.md
│       └── 6-learning.md    ← NO index.md here
├── sales/
├── engineering/
└── operations/

Rules:

1. Stop at 1-input.md — If directory contains 1-input.md, it's a thread leaf. Do NOT create index inside.
2. Read 1-input.md — Extract thread_id from frontmatter and first heading for parent index entry.
3. Index at domain level — marketing/index.md lists all threads under it.

1-input.md frontmatter (source for index):

---
thread_id: marketing_content-authority_2026q1
goal_id: distribution-q1/1.content-authority
created: 2026-02-01
owner: mkt-content-manager
status: active
---
# Content Authority Execution

Generated index (e.g., marketing/index.md):

# Marketing

- [content-authority_2026q1](./content-authority_2026q1/) — Content Authority Execution

↑ [Threads](../)

Process

1. Scan

find {root} -type f -name "*.md" \
  ! -path "*/node_modules/*" \
  ! -path "*/.git/*" \
  ! -path "*/src/*" \
  ! -path "*/lib/*" \
  ! -path "*/dist/*" \
  ! -path "*/build/*" \
  ! -path "*/vendor/*"

2. Check for Terminal Directory

# Terminal = has NO subdirectories (only files)
# Do NOT create index.md in terminal directories
# Instead, parent index lists their contents under ## heading

if directory has subdirectories:
  → CREATE index.md (lists files + subdirs)
else:
  → SKIP index.md — parent will bubble up contents

3. Check for Thread Leaf

# If 1-input.md exists, this is a thread — do NOT index inside
if [ -f "{dir}/1-input.md" ]; then
  # Skip — parent will index this via 1-input.md frontmatter
  exit
fi

4. List

For .md files: - [{name}](./{name}.md) — {snapshot} For non-terminal dirs: - [{name}](./{name}/) — {snapshot} For terminal dirs: bubble up contents under ## {dir_name} heading:

## {dir_name}
- [{file}](./{dir_name}/{file}.md) — {snapshot}

For threads (has 1-input.md): read thread_id and first heading from 1-input.md

Description: first heading or first line — max 40 chars, truncate with …

5. Link Navigation

• ↑ [Parent](../)
• → [Related](../related/)

6. Recurse

For subdirs with content → generate index → link ↑↓ Skip when:

• Directory contains 1-input.md (thread leaf)
• Directory has no subdirectories (terminal — contents bubbled up to parent)

Output Format

# {Directory Name}

- [{item}](./{item}/) — {snapshot}
- [{item}](./{item}.md) — {snapshot}

↑ [Parent](../)

Examples

Artifacts:

# Artifacts

## sales
- [q4-deck](./sales/q4-deck/) — Q4 investor pitch materials
- [prospects](./sales/prospects/) — Enterprise lead tracking

## engineering
- [auth-service](./engineering/auth-service/) — OAuth2 implementation

→ [Strategy](../strategy/) · [Threads](../threads/)

Threads (domain level):

# Marketing

- [campaigns](./campaigns/) — Product launch campaigns
- [content](./content/) — Blog and social content

↑ [Threads](../)

Threads (domain level — reads from 1-input.md):

# Marketing

- [content-authority_2026q1](./content-authority_2026q1/) — Content Authority Execution
- [github-organic_2026q1](./github-organic_2026q1/) — GitHub Organic Growth Execution

↑ [Threads](../)

Strategy (canvas is terminal — files bubble up):

# Strategy

- [Goals](./goals/) — OKRs and milestones

## Canvas
- [00.mode](./canvas/00.mode.md) — Business Model Mode
- [01.context](./canvas/01.context.md) — Strategic Context (KBOS)

→ [Artifacts](../artifacts/)

Boundaries

Does: List .md files, read 1-input.md for threads, generate links, build navigation

Does NOT:

• Index code files
• Create index inside thread dirs (with 1-input.md)
• Create index in terminal directories (no subdirs)
• Infer status or add judgment

Error Handling

References

• references/patterns.md — Detection patterns for directory types and navigation
• references/templates.md — Index.md templates per directory type