reddit-get-thread

Reads one whole thread from its permalink, chains straight off reddit-search-posts. Read the thread before reddit-comment, so the reply answers what people actually said. Resolves in a single bridge call: the extractor fetches what it needs itself, so the params actually drive the request and no page is opened.

The extractor lives as text in the site's localStorage (key reddit-get-thread) and is rebuilt on each call with synchronous eval. It is stored once and then persists across navigation and browser restarts, so on every run except the first it is already there.

Default action: just call (step 1). The call itself reports NEEDS_STORE when the extractor is missing or out of date, only then do you store it (step 2) and call again.

Versioning. The stored extractor is gated by VER (must match the version in the frontmatter above). Both snippets carry VER = "1", keep them in sync with the frontmatter. When evaluate.js changes, bump version and VER in both snippets: the next call sees the mismatch, returns NEEDS_STORE, and re-stores automatically. Storage stays at two keys (reddit-get-thread and reddit-get-thread:ver), overwritten each store, versions never accumulate.

1. Call (do this every run, params only, single bridge call)

await (() => {
  const KEY = "reddit-get-thread", VER = "1";
  const s = localStorage.getItem(KEY);
  if (!s || localStorage.getItem(KEY + ":ver") !== VER) return 'NEEDS_STORE';
  const fn = eval('(' + s + ')');
  return fn(document, { permalink: "https://www.reddit.com/r/webdev/comments/1rwi6a5/whats_the_best_browser_automation_tool_in_terms/" });
})()

Returns the post and its flattened comment tree. If it returns the string 'NEEDS_STORE', the extractor is missing or stale in this browser → do step 2 once, then run this exact call again.

Run this snippet verbatim. Never add an await before the eval, only the outer await is allowed.

Any reddit.com tab works, the extractor never reads the open page; the tab only supplies the origin and session.

2. Store (only when step 1 returned NEEDS_STORE; persists until localStorage is cleared)

From any reddit.com tab, evaluate the following with the bridge, replacing <FN> with the contents of evaluate.js (the ( async (root, params) => { ... } ) function). Keep VER equal to the call snippet's:

(() => {
  const KEY = "reddit-get-thread", VER = "1";
  const fn = (<FN>);
  localStorage.setItem(KEY, String(fn));
  localStorage.setItem(KEY + ":ver", VER);
  return 'stored';
})()

Returns "stored". The extractor passes through the model only here, once. Then go back to step 1.

Notes

Comments come back flattened with a depth field rather than nested, so a reply chain reads in order. limit caps the top-level comments Reddit returns, not the total after replies are walked.

Errors

• NEEDS_STORE → extractor missing or version-mismatched in this browser; run step 2 once, then retry step 1.
• Empty comments → the thread has none, or the permalink is wrong.
• request_failed / fetch fail → no reddit.com tab open, or the call ran cross-origin.

Success assertion

{ "type": "json", "jsonPath": "commentCount" }