domain-skills: add google-trends (Glimpse) skill; fix reddit JSON datacenter block

[alexandme]

What

New domain-skills/google-trends/scraping.md — Google Trends + the Glimpse extension overlay:

• explore URL patterns (single term, compare ≤5 on one normalized axis, date=all for 2004→now structural views, Worldwide via omitted geo)
• extracting Glimpse's modeled absolute monthly volume + YoY from innerText, with direction decoded by sign AND pill color (rgb(118,191,80) = up) — a naive \d+% silently misreads down-terms as up, so unicode-minus normalization + the color check are both needed
• "Undetermined volume" handling, People Also Search, Discover Trends category drill-down table + CSV export, one-click Get Alerts (saves an Auto alert), Export Data
• traps: Glimpse absolute volume is a model (treat as rough — trust relative shape/direction/head-to-head), raw Trends is a relative 0-100 index, compare-mode normalizes to the top term, and the chart is not recharts (no JSON/__react* props)

domain-skills/reddit/scraping.md — documents that http_get() and same-origin www.reddit.com/.json now return a 403 datacenter block, and the old.reddit.com same-origin fetch workaround, plus listing-endpoint fan-out (/r/<sub>/top.json?t=year) for mining a whole sub by engagement rather than reading one post at a time. Includes the js() gotcha that the return keyword triggers a sync-IIFE wrap that breaks top-level await (use .then() chains).

Why

Built both while doing trend research; each cost a few exploratory steps to work out (the Glimpse direction-encoding and the Reddit block in particular), so filing them so the next run doesn't pay the same tax — per the SKILL's "always contribute back" norm.

Testing

All techniques exercised live against trends.google.com (with Glimpse installed) and old.reddit.com via the harness.

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Summary by cubic

Add a new Google Trends + Glimpse scraping skill to extract absolute monthly volume, YoY, and direction, and document a Reddit .json datacenter block with a working old.reddit.com fetch path. Also adds guidance for Discover Trends CSV/alerts and mining subs via listing endpoints.

• New Features

  • Google Trends + Glimpse skill: URL patterns, overlay detection, and timed extraction of volume/YoY with unicode-minus normalization and color-based direction.
  • Discover Trends table parsing and CSV export; one-click Get Alerts flow and verification.
  • Key traps: Glimpse volume is modeled (use for shape/direction), raw Trends is 0–100 index, compare mode normalizes to the top term.

• Bug Fixes

  • www.reddit.com/.json now returns 403; use old.reddit.com with same-origin fetch() to avoid the datacenter block.
  • Listing endpoints for top/hot/new/controversial.json with limit and t params to mine subs by engagement.
  • js() gotcha: avoid return in async chains; use .then()/Promise.all instead.

^{Written for commit 29cc1ac. Summary will update on new commits.}

[browser-harness-review]

✅ Skill review passed

Reviewed 2 file(s) — no findings.

[cubic-dev-ai]

No issues found across 2 files

_{Re-trigger cubic}