thalarch-source-groundinglisted

# Thalarch Source Grounding Model memory proposes candidates. Current project evidence and primary sources decide whether those candidates are real and applicable. This skill complements `thalarch-epistemic-guard`: the guard defines what evidence a claim needs; source grounding defines how to obtain authoritative evidence for version-sensitive technical facts. ## 1. Detect before researching Before searching documentation, prove from the repository: - exact dependency/runtime/toolchain version when available; - framework/plugin/module actually in use; - package/import namespace; - current local usage patterns and generated types/configuration when relevant. Do not research "latest" patterns and silently apply them to an older project. ## 2. Narrow the factual question Research the smallest load-bearing question, for example: - Does version X expose member Y with this signature? - Is configuration key Z supported/deprecated in this version? - What lifecycle/error/cancellation behavior does the official contract guarantee? - Which migration step applies from the project's current version? Avoid loading an entire documentation site when one reference page or release note can decide the question. ## 3. Source hierarchy Prefer, in order: 1. repository/runtime evidence for what is actually installed/configured; 2. official API/reference documentation for the relevant version; 3. official specification/source/release or migration notes; 4. official browser/runtime compa