Overleaf Sync

Overleaf Sync

Bridge a local paper directory with an Overleaf project so that:

• You can keep editing in the Overleaf web UI (or share editing access with collaborators)
• ARIS can read your changes, run audits (/paper-claim-audit, /citation-audit, /auto-paper-improvement-loop), and push fixes back

This uses the official Overleaf Git bridge (Premium feature). The agent never sees your authentication token — you do the one-time auth manually so the token lives in macOS Keychain, not in chat history or .git/config.

When to Use This Skill

• You want to use Overleaf as the editing surface (better collaboration, shared with team) but still run ARIS pipelines locally
• You want to take an existing local ARIS paper and push it to Overleaf for a co-author to edit
• A collaborator made changes in Overleaf and you want to pull + diff them before continuing local work

Constants

• CLONE_DIR_DEFAULT = paper-overleaf (sibling of existing paper/, NOT inside paper/)
• CREDENTIAL_HELPER = osxkeychain (macOS) / manager (Windows) / cache (Linux fallback)
• TOKEN_HANDLING = NEVER write token to disk, env var, or chat. User pastes it once into the terminal credential prompt; the OS keychain stores it from then on.

Architecture

┌─────────────────┐       git pull/push      ┌─────────────────┐
│  Local paper/   │ ◄─── rsync ──── ►       │ paper-overleaf/ │ ◄──► Overleaf web
│  (ARIS audits)  │                          │ (git bridge)    │     (collaborators)
└─────────────────┘                          └─────────────────┘

The paper-overleaf/ directory is a git clone of the Overleaf project. The paper/ directory is the working copy where ARIS skills run. They are kept in sync via rsync.

Single-source-of-truth rule: at any given time, treat one of them as authoritative for active editing. Switch directions explicitly with pull or push, and run a status check before either to surface unexpected divergence.

Sub-commands

setup <project-id> — one-time

Sets up the bridge for a new Overleaf project. The user runs this in their own terminal, never through the agent. The skill ships with a hardened setup script that:

1. Refuses to run unless stdin/stdout are a TTY (won't run inside an agent harness)
2. Reads the token from a hidden prompt (no chat history, no shell history)
3. Strips the token from the remote URL immediately after cloning
4. Primes the OS keychain so subsequent agent operations are auth-free
5. Auto-installs a pre-commit hook in paper-overleaf/.git/hooks/ that refuses to commit any blob containing the token pattern olp_[A-Za-z0-9]{20,} — a hard technical block, not a behavioral rule

The agent's only role here is to print the user instruction:

Run this in your own terminal (NOT through me):

    bash <ARIS_REPO>/tools/overleaf_setup.sh <project-id-or-url>

When it finishes, tell me "setup done" and I'll verify.

After the user reports "setup done", the agent verifies (token-free):

cd paper-overleaf
git remote -v                    # must show URL WITHOUT token
git config --get credential.helper
git fetch && git log --oneline -3   # must succeed without prompting
ls .git/hooks/pre-commit         # must exist
bash <ARIS_REPO>/tools/overleaf_audit.sh .   # must report "Audit clean"

If paper-overleaf/ exists but is empty (new Overleaf project), the agent then mirrors local paper/ into it (see push workflow).

pull — before each editing session

cd paper-overleaf && git pull --ff-only

# Show what changed since last pull
LAST=$(git rev-parse HEAD@{1})
git diff --stat $LAST..HEAD
git diff $LAST..HEAD -- 'sec/*.tex'        # detailed view for prose changes

Diff protocol — DO NOT blindly merge into local paper/. Overleaf edits frequently include:

• Half-finished sentences (collaborator clicked save mid-thought)
• Typos that aren't in canonical references (Lrage for Large)
• Commented-out blocks that may be intentional or may be a stash
• Number changes that should re-trigger /paper-claim-audit
• Cite key changes that should re-trigger /citation-audit

For each diff hunk, decide one of:

After deciding per-hunk:

# Sync only the files the user approved into local paper/
rsync -av paper-overleaf/sec/0.abstract.tex paper/sec/0.abstract.tex
# (or use Edit tool for surgical changes that skip half-sentences)

push — after local editing

Use after ARIS skills have edited paper/ and you want collaborators on Overleaf to see the changes.

# 1. Always pull first to surface remote drift
cd paper-overleaf && git pull --ff-only

# 2. If pull was a no-op, sync local paper → paper-overleaf
rsync -av --delete \
  --exclude='.git' --exclude='.DS_Store' \
  --exclude='*.aux' --exclude='*.log' --exclude='*.bbl' --exclude='*.blg' \
  --exclude='*.fls' --exclude='*.fdb_latexmk' --exclude='*.out' \
  --exclude='*.synctex.gz' --exclude='*.toc' \
  paper/ paper-overleaf/

# 3. Show what would be pushed
git status --short
git diff --stat

# 4. Commit + push
git add -A
git commit -m "<descriptive message — what ARIS changed and why>"
git push

Commit message protocol: include the ARIS skill that produced the change so collaborators on Overleaf understand provenance. Examples:

• paper-write: regenerated sec/3.assurance after audit cascade refactor
• citation-audit: fix 14 metadata entries (madaan2023, lee2024, ...)
• paper-claim-audit: correct sec/5 numbers vs results/run_2026_04_19.json

Confirmation gate: push writes to a shared resource. ALWAYS show the user git diff --stat (and a representative hunk for prose changes) before running git push. Wait for explicit confirmation unless the user said auto: true upfront.

status — diagnostic

cd paper-overleaf
git fetch
echo "=== Remote-vs-local divergence ==="
git log --oneline HEAD..origin/master    # remote ahead
git log --oneline origin/master..HEAD    # local ahead
echo "=== paper/ vs paper-overleaf/ divergence ==="
diff -rq --brief paper/ paper-overleaf/ 2>/dev/null \
  | grep -v "Only in paper/.*\.\(aux\|log\|out\|fls\|fdb_latexmk\|bbl\|blg\|synctex\|toc\)" \
  | grep -v "Only in paper-overleaf/.git" \
  | grep -v "DS_Store"

Three-way state assessment:

Conflict Resolution

If git pull --ff-only fails because of true divergence:

1. Do not run git pull (which would auto-merge).
2. Do not run git reset --hard or git push --force (destructive).
3. Show the user git log origin/master ^HEAD (their Overleaf commits) and git log HEAD ^origin/master (local ARIS commits).
4. Ask the user which side to take per file, or to manually merge in Overleaf and then re-pull.

Token Security — Defense in Depth

Behavioral rules alone are not enough — the next agent reading this skill might forget them. The skill therefore relies on technical guards that hold even if the agent misbehaves:

Behavioral rules (still apply, but secondary):

• Never ask the user to paste a token into chat. If they do anyway: (a) acknowledge it, (b) tell them to revoke it at https://www.overleaf.com/user/settings, (c) recover via keychain if already primed.
• Never write a token to a file (.env, .netrc, tools/*.sh, etc.) committed to any repo.
• Never include a token in a git remote -v URL — strip it after clone.
• On 401 Unauthorized from push/pull, tell the user the keychain entry expired and to re-run overleaf_setup.sh. Do not ask for a fresh token.

Mutual-Exclusion Rule

The single biggest source of pain in two-way sync is simultaneous editing on both sides.

• If the user is in an active Overleaf editing session, ARIS skills should read-only access paper/ until the user runs /overleaf-sync pull.
• If ARIS is in the middle of /auto-paper-improvement-loop or /paper-write, the user should pause Overleaf editing until the loop finishes and /overleaf-sync push is run.

When in doubt, run status first.

Output Contract

• paper-overleaf/ directory at repo root, git clone of Overleaf project (origin URL has NO token)
• paper/ directory unchanged in role — still the ARIS working copy
• Each pull/push operation: a one-line summary back to the user (commits pulled / pushed, file count, link to Overleaf project URL)

See Also

• /paper-claim-audit — re-run after pulling Overleaf changes that touch numbers
• /citation-audit — re-run after pulling Overleaf changes that add/edit \cite{...}
• /paper-compile — local LaTeX build; Overleaf compiles independently in the cloud
• Overleaf Git bridge docs: https://www.overleaf.com/learn/how-to/Using_Git_and_GitHub