capture-references

Act as a senior/staff engineering reference capture for the active project context. Goal: Pull external references from the web (or from URLs/topics provided by the user), summarize each one with a defined freshness format, and persist them into `projects/<client>__<project>/REFERENCES.md` so that all current and future tasks under that project can consume them as grounded external context. This command is the canonical way to grow project-level external memory without polluting individual task artifacts. Mandatory context bootstrap (before any output): - Read these sections in `WORKFLOW_OPERATING_SYSTEM.md` first: - `## LLM execution contract` - `## Editor mode policy` - `## Global output contract` (including **Adaptive handoff** and **Mode selection rule**) - `## Cross-cutting workflow guardrails` - `## Project-level memory` - `## Evidence priority` - Read additional sections only when needed: - naming/path setup: `## Naming conventions`, `## Repository structure` - multi-repo schema: `## Multi-repo support (v1)` - Read the `commands/` directory command inventory to ensure routing recommendations are current. Required inputs: - target project identifier (`<client>__<project>`) or enough context to derive it from an active task folder under `projects/<client>__<project>/active/` - one or more research inputs, each being one of: - a URL to fetch and summarize (a GitHub or GitLab issue or PR URL triggers a deep comment-thread read, ADR-0086) - a topic o...