DoorDash Spend Guard

A budget stated in a prompt is advisory — the model can forget it mid-session and prompt injection can override it. This skill makes the budget deterministic: every checkout and cart mutation goes through one audited wrapper (dd-guard.sh) that prices the cart, checks the policy, and refuses out-of-policy actions with a machine exit code. The companion PreToolUse hook (doordash-spend-guard hook component) denies raw dd-cli order checkout-url / dd-cli cart add-items calls that try to bypass the wrapper.

Unofficial community skill built on DoorDash's doordash-oss/doordash-cli. Requires dd-cli installed and logged in. Wrapper needs python3.

Honest scope

• Caps apply to the pre-fee subtotal that cart show exposes; fees, tip and tax land on the DoorDash payment page. Documented headroom, not loopholes.
• The ledger records intent when a checkout URL is issued; the human may abandon the page. /doordash-budget reconciles intents against dd-cli order history, marking entries paid or abandoned.
• Enforcement teeth come from the hook + wrapper combo. Install both; the skill alone is guidance.

Components in this bundle

State (created on first run)

• ~/.claude/dd-guard/limits.json — policy. Human-edited only. Never edit this file yourself; when the user asks for a change, direct them to /doordash-budget which confirms interactively.

{
  "per_order_max": 40,
  "daily_max": 60,
  "weekly_max": 150,
  "monthly_max": 400,
  "cooldown_minutes": 45,
  "allowed_hours": { "start": 7, "end": 23 }
}

• ~/.claude/dd-guard/ledger.jsonl — one line per priced action: {"ts": "...", "cart_uuid": "...", "subtotal": 24.5, "status": "intent"} (status becomes paid / abandoned after reconciliation).

Protocol (follow ALWAYS while this skill is installed)

1. Session start / before building a cart: report headroom — bash .claude/skills/doordash-spend-guard/scripts/dd-guard.sh status prints spend-to-date vs each cap. Tell the user their remaining budget before adding items.
2. Adding items: route through the wrapper — bash .claude/skills/doordash-spend-guard/scripts/dd-guard.sh add-items <the exact dd-cli cart add-items args> The wrapper execs the real dd-cli cart add-items ... and re-prices the cart afterwards.
3. Checkout: NEVER call dd-cli order checkout-url directly. Use bash .claude/skills/doordash-spend-guard/scripts/dd-guard.sh checkout <cart-uuid>
   • exit 0 → it printed the checkout URL and appended a ledger intent line.
   • exit 2 → blocked; it printed a human-readable reason (which cap, by how much). Relay the reason verbatim, then help within policy — e.g. suggest a cheaper reorder from dd-cli order history or trimming the cart with dd-cli cart remove-item.
4. When blocked, do not negotiate with the wrapper. No editing limits.json, no retrying with a fresh cart to reset the cooldown, no splitting one order into several to duck the per-order cap. If the user wants a different policy, point them to /doordash-budget.
5. If the wrapper reports the cart subtotal as unparseable, it blocks by design (conservative default). Show the user the raw cart show output and ask them to confirm the total explicitly before any manual override.

Reading the ledger

Answer "how much have I spent this week?" from the ledger, not memory:

bash .claude/skills/doordash-spend-guard/scripts/dd-guard.sh status
# or raw:
cat ~/.claude/dd-guard/ledger.jsonl | jq -s '[.[] | select(.status != "abandoned")] | map(.subtotal) | add'

Remind the user that subtotals exclude fees/tips and intents may not have been paid — /doordash-budget reconciles.