quantmodel — Specify custom Meta strategy construction

Objective

Specify custom Meta strategy construction.

Notes: Specified custom-meta-v1: 2–25 explicit registry strategies, conservative possible-tradable-asset allow/exclude filters, stable validation codes, canonical snapshot digest/report identity, URL/local-save precedence, disclosures, and t252 acceptance fixtures.

Approach

Reuses existing report research/findings/custom-meta-construction-spec-t251.md — tables/metrics preserved verbatim via source_report pointer. Body below summarizes grounded evidence from that report and adjacent artifacts.

Files / code / data changed

No commit SHA confidently associated with t251 in sampled log [reconstructed — uncertain].
Source report: research/findings/custom-meta-construction-spec-t251.md
Task-history entry: research/findings/task-history.json#t251

Results

Key table from source report (preserved):

Code	Condition
`unsupported_version`	version is not exactly `custom-meta-v1`
`invalid_strategy_count`	fewer than 2 or more than 25 selected IDs
`duplicate_strategy_id`	an ID repeats
`unknown_strategy_id`	an ID is absent from the runnable registry
`invalid_asset_id`	malformed/noncanonical asset or asset unknown to the catalog
`conflicting_asset_policy`	an asset is both allowed and excluded

| insufficient_eligible_strategies | filters leave fewer than 2 can

Conclusions and metrics are in research/findings/custom-meta-construction-spec-t251.md; see detail page for preserved tables/metrics.

Conclusions

[reconstructed — uncertain] Outcome inferred from status done and task note.

Problems / follow-ups

See source report or PR discussion for follow-ups. No unsupported follow-ups fabricated.