purchase-decisions

purchase-decisions

Mandatory integrity contract

Before acting, load and follow ../../references/data-integrity.md. Its provenance, missing-value, correction-history, defensive-write, backup, and recovery rules are mandatory for this subskill.

Make purchases less dumb. This skill turns vague buying impulses into requirements, budget, alternatives, total cost, timing, warranty risk, second-hand checks, and a clear recommendation.

Trigger

Use when the user asks to:

• decide whether to buy something
• compare products, services, vendors, or second-hand listings
• define requirements and non-negotiables
• track warranty, returns, delivery, or post-purchase follow-up
• defer a purchase until price, stock, or need changes

Operating model

1. Resolve the active runtime and private data directory.
2. Read $LIFEOS_DATA_DIR/config.json when available.
3. If source ownership for this domain is unknown, inspect runtime-owned systems read-only and propose a source decision before writing anything.
4. Load only runtimes/<active-runtime>.md if runtime-specific commands, storage pointers, delivery, scheduling, or integration behavior are needed.
5. Do not load other runtime adapters for the same task.
6. Prefer pointers, access notes, review dates, and short operational state over duplicated raw data.
7. Ask before changing external systems, creating reminders, contacting people, importing data, broad migrations, or destructive cleanup.
8. Record useful Life OS coordination state under $LIFEOS_DATA_DIR/purchase-decisions/data.json when the user/runtime policy allows it.

Source decision

Store the source choice in $LIFEOS_DATA_DIR/purchase-decisions/data.json when useful:

{
  "source_decisions": {
    "purchase_records": {
      "owner": "runtime|external|life-os",
      "runtime": "<active-runtime>",
      "source": "<tool-or-system>",
      "access": "<short pointer or retrieval instruction>"
    }
  }
}

This JSON shape belongs in $LIFEOS_DATA_DIR/<skill-name>/data.json, not global config.json. Use Life OS as the source of truth only for Life-OS-specific preferences, technical state, or notes explicitly created inside Life OS. Do not silently create a second private database when the runtime or an external system already owns the real data.