Analyze existing source materials and prior work to produce structured documents in .planning/sources/ For brownfield writing projects where materials already exist: prior drafts, notes, data files, literature PDFs, etc. **Why map existing materials:** - Avoid duplicating work already done - Find usable prose from prior drafts - Understand what sources are already available - Identify gaps in existing materials - Create actionable index for planning **Document quality over brevity:** Include enough detail to be useful during writing. A thorough literature.md with organized sources is more valuable than a sparse list. **Always include file paths:** Documents are reference material for Claude when planning/writing. Vague descriptions are not actionable. Always include actual file paths to source materials. [step:check_existing p=1] RUN: ls -la .planning/sources/ 2>/dev/null IF exists → ``` IF doesnt_exist → Continue to create_structure. [/step] [step:create_structure] RUN: mkdir -p .planning/sources [/step] [step:scan_materials] [/step] [step:analyze_literature] RUN: cat references.bib 2>/dev/null | head -100 [/step] [step:analyze_data] [/step] [step:analyze_drafts] [/step] [step:verify_output] RUN: ls -la .planning/sources/ [/step] [step:commit_source_map] RUN: git add .planning/sources/*.md [/step] [step:offer_next] [/step] - .planning/sources/ directory created - All source material types scanned - literature.md created with bibliography index - data.md created with figures/tables inventory - prior-drafts.md created with usable content identified - Gaps in materials identified - Documents committed to git - User offered clear next steps