feat: add /setup_docs, /reset, /expand commands and /upskill skill

Adds four contributions from @Michael-Bach:

- /setup_docs - document-driven profile population from a documents/ folder (CV, LinkedIn export, diplomas, references, past applications). Idempotent merge with explicit additive vs. conflicting buckets and per-conflict prompts.
- /reset - typed-RESET confirmation gate for clearing profile data and/or documents folder contents.
- /expand - additive competency enrichment from documents and public URLs already in the profile (GitHub repos, portfolio sites), with web-searched syllabus lookups for named courses and certifications.
- /upskill - skill-gap analysis vs tracked jobs (or single URL), produces a prioritized heatmap and learning plan with year-tagged WebSearch queries.

Also adds the documents/ folder convention with README and gitignore entries for personal output files.

Closes #6

.claude/commands/reset.md

@@ -0,0 +1,227 @@
+# /reset - Reset Candidate Profile Data
+
+You are resetting parts of the job search framework back to a blank state so the user can start fresh with `/setup` or `/setup_docs`.
+
+**This command is destructive.** Nothing is deleted until the user explicitly confirms. Follow these steps exactly in order.
+
+---
+
+## Step 0: Parse Scope from Arguments
+
+Check `$ARGUMENTS` for a scope keyword:
+
+- `profile` — clears candidate profile data from skill files only
+- `documents` — deletes user-provided files from the `documents/` folder only
+- `all` — both of the above
+
+If `$ARGUMENTS` is empty or does not contain a recognized scope keyword, ask:
+
+> **What would you like to reset?**
+>
+> - **`profile`** — Clears candidate data from the skill files (profile, behavioral, STAR examples, profile statements). The framework structure and writing rules are preserved. Use this to re-run `/setup` or `/setup_docs` from scratch.
+>
+> - **`documents`** — Deletes all files you've placed in the `documents/` folder (CV PDFs, LinkedIn export, diplomas, references, past applications). The folder structure and `README.md` are preserved.
+>
+> - **`all`** — Both of the above.
+>
+> Reply with `profile`, `documents`, or `all`.
+
+Wait for the user's response before continuing.
+
+---
+
+## Step 1: Show Exactly What Will Be Cleared
+
+Before doing anything, show the user precisely what will be wiped.
+
+### If scope includes `profile`:
+
+Read the current state of these files and report whether each has content or is already empty:
+
+- `.claude/skills/job-application-assistant/01-candidate-profile.md`
+- `.claude/skills/job-application-assistant/02-behavioral-profile.md`
+- `.claude/skills/job-application-assistant/05-cv-templates.md` *(profile statements section only — framework structure is preserved)*
+- `.claude/skills/job-application-assistant/07-interview-prep.md` *(STAR examples and STAR candidates sections only — framework structure is preserved)*
+
+Present as:
+
+```
+## Profile reset will clear:
+
+- 01-candidate-profile.md — [has content / already empty]
+  Full file will be replaced with a blank template.
+
+- 02-behavioral-profile.md — [has content / already empty]
+  Full file will be replaced with a blank template.
+
+- 05-cv-templates.md — [has profile statements / already blank]
+  Profile statement templates will be cleared. LaTeX structure and tailoring guidelines are preserved.
+
+- 07-interview-prep.md — [has STAR examples / already blank]
+  STAR examples and any STAR candidate stubs will be cleared. Framework, tough questions, and roleplay guidelines are preserved.
+
+The following files are NOT touched (they contain framework rules, not candidate data):
+  - 03-writing-style.md
+  - 04-job-evaluation.md
+  - 06-cover-letter-templates.md
+```
+
+### If scope includes `documents`:
+
+Use Glob to list all files present in `documents/cv/`, `documents/linkedin/`, `documents/diplomas/`, `documents/references/`, and `documents/applications/`. Present as:
+
+```
+## Documents reset will delete:
+
+documents/cv/
+  - [filename] or "(empty)"
+
+documents/linkedin/
+  - [filename] or "(empty)"
+
+documents/diplomas/
+  - [filename] or "(empty)"
+
+documents/references/
+  - [filename] or "(empty)"
+
+documents/applications/
+  - [subfolder/filename] or "(empty)"
+
+documents/README.md — NOT deleted (instructions file)
+```
+
+If all document subfolders are already empty, state "All document subfolders are already empty — nothing to delete." and skip the confirmation step for this scope.
+
+---
+
+## Step 2: Require Explicit Confirmation
+
+Present the confirmation prompt:
+
+> **This cannot be undone.**
+>
+> Type **`RESET`** (all caps) to confirm, or anything else to cancel.
+
+Wait for the user's response.
+
+- If the user types exactly `RESET`: proceed to Step 3.
+- If the user types anything else: abort and tell them "Reset cancelled. Nothing was changed."
+
+---
+
+## Step 3: Execute the Reset
+
+### Profile reset
+
+**For `01-candidate-profile.md`**, replace the file content with:
+
+```markdown
+# Candidate Profile
+
+<!-- Run /setup or /setup_docs to populate this file -->
+
+## Identity
+
+## Education
+
+## Professional Experience
+
+## Independent Projects
+
+## Technical Skills
+
+## Publications
+
+## Awards
+
+## References
+```
+
+**For `02-behavioral-profile.md`**, replace the file content with:
+
+```markdown
+# Behavioral Profile
+
+<!-- Run /setup or /setup_docs to populate this file -->
+
+## Overview
+
+## Strongest Behavioral Traits
+
+## How I Work Best
+
+## Growth Areas
+
+## Mapping to Job Posting Language
+
+## Management Style Preferences
+
+## Using This in Applications
+```
+
+**For `05-cv-templates.md`**, locate the section that begins with `**Profile statement templates` and extends through the role-specific template blocks. Replace only that section with:
+
+```markdown
+**Profile statement templates:**
+
+<!-- Run /setup or /setup_docs to populate role-specific profile statements -->
+```
+
+Leave all other content in `05-cv-templates.md` intact.
+
+**For `07-interview-prep.md`**, locate and remove:
+- The entire `## Ready-Made STAR Examples` section and all numbered STAR examples under it
+- Any `## STAR Candidates (Complete Manually)` section added by `/setup_docs`
+
+Replace with:
+
+```markdown
+## Ready-Made STAR Examples
+
+<!-- Run /setup or /setup_docs to populate STAR examples from your actual experience -->
+```
+
+Leave all other content in `07-interview-prep.md` intact (STAR format explanation, tough questions, questions to ask interviewers, phone/video tips, follow-up etiquette, roleplay guidelines).
+
+### Documents reset
+
+For each non-empty document subfolder, delete all files within it using Bash `rm`. Do not delete the folder itself, and do not delete `documents/README.md`.
+
+```bash
+rm -f documents/cv/*
+rm -f documents/linkedin/*
+rm -f documents/diplomas/*
+rm -f documents/references/*
+rm -rf documents/applications/*/
+```
+
+---
+
+## Step 4: Confirm What Was Done and Next Steps
+
+After the reset is complete, report:
+
+```
+## Reset complete
+
+### Cleared
+[List each file/folder that was actually modified or cleared]
+
+### Unchanged
+[List anything that was already empty or was intentionally preserved]
+```
+
+Then tell the user what to do next based on what was reset:
+
+**If profile was reset:**
+> Your candidate profile is now blank. To repopulate it:
+> - Run `/setup_docs` if you have documents in the `documents/` folder — it will re-read them and rebuild the profile files.
+> - Run `/setup` for an interactive interview to fill in your profile from scratch.
+> - You can also run `/setup_docs` first, then `/setup` to fill in anything the documents didn't cover.
+
+**If documents were reset:**
+> The `documents/` folder is now empty. Add your career documents and run `/setup_docs` to populate your profile. See `documents/README.md` for instructions on what to put where.
+
+**If both were reset:**
+> Both your profile files and documents folder are now empty. Add documents to `documents/` and run `/setup_docs`, or run `/setup` for an interactive setup interview.