Check Stablecoins

Check stablecoins

This skill audits all stablecoin YAML files in eth_defi/data/stablecoins/ for liveness — checking whether their Twitter/X accounts are active and homepage domains are reachable. It adds a checks section to each file and attempts to fill in missing information. If wind-down news is found, it updates long_description.

Required inputs

None. The skill operates on the full set of stablecoin YAML files automatically. Optionally the user may specify:

1. Recheck mode - Whether to overwrite existing checks sections (default: skip files that already have checks)
2. Subset - A glob or list of specific YAML files to check (default: all *.yaml in the stablecoins directory)

Output format

Each YAML file receives a checks mapping with these keys:

checks:
  twitter_last_post_at: '2026-03-10'
  domain_up_at: '2026-03-17'
  marked_dead_at: ''
  information_found_missing_at: ''

Field definitions

• twitter_last_post_at - Date (YYYY-MM-DD) of the most recent Twitter/X post. Empty string if the account is deleted, suspended, missing, or if no twitter link exists and none could be found.
• domain_up_at - Date (YYYY-MM-DD) when the homepage was confirmed reachable. Empty string if the homepage is down, unreachable, or if no homepage link exists and none could be found.
• marked_dead_at - Date (YYYY-MM-DD, set to today) only with strong evidence: a known-good domain is down, OR a known-good Twitter account's last post is more than 6 months ago. Never set just because information is missing. Empty string if the stablecoin appears alive or if evidence is insufficient.
• information_found_missing_at - Date (YYYY-MM-DD, set to today) if we could not determine liveness: no twitter AND no homepage links exist (even after searching), or all checks returned inconclusive results. This flags files needing manual review. Empty string if at least one check succeeded.

Placement rules

• Single-entry files (files with top-level name and links): Add checks at the top level, as the last key.
• Multi-entry files (files with entries: list): Add checks inside each entry, after that entry's other keys. Each entry has its own twitter/homepage and must be checked independently.

Step 1: Inventory and batch assignment

1. Use Glob to list all *.yaml files in eth_defi/data/stablecoins/.
2. Read each YAML file to determine:
   • Whether it already has a checks section (skip unless recheck mode)
   • Whether it is single-entry or multi-entry format
   • Extract all links.twitter and links.homepage URLs
3. Divide the files needing checks into 8 batches of roughly equal size (~24 files each).
4. Record the batch assignments so each subagent knows exactly which files to process.

Step 2: Spawn subagents for parallel checking

Spawn 8 subagents using the Agent tool in a single message (all 8 in parallel). Each subagent receives:

• Its batch of YAML file paths (as a list)
• The current date string (YYYY-MM-DD format, for date fields)
• The complete subagent instructions below

Subagent instructions

For each YAML file in your batch, perform these steps:

2a: Read the file

Read the YAML file with the Read tool. Identify whether it is single-entry (top-level links) or multi-entry (entries: list). For multi-entry files, process each entry separately. Extract the name, links.twitter, and links.homepage values.

2b: Fill missing information

If links.twitter is empty (''):

1. Use WebSearch with query "{stablecoin name}" stablecoin twitter site:x.com to try to find the project's Twitter/X account.
2. If a clear match is found, update the twitter field in the YAML file's links section using the Edit tool.
3. If no match is found, leave it empty and continue.

If links.homepage is empty (''):

1. Use WebSearch with query "{stablecoin name}" stablecoin official website to try to find the project's homepage.
2. If a clear match is found, update the homepage field in the YAML file's links section using the Edit tool.
3. If no match is found, leave it empty and continue.

2c: Check Twitter/X

For each links.twitter URL (including any newly found ones):

1. If the URL is empty after step 2b, set twitter_last_post_at: ''.
2. If the URL is present, use WebFetch on the Twitter/X profile URL to check the account. Look for:
   • The date of the most recent tweet/post
   • Signs the account is suspended, deleted, or does not exist
3. If WebFetch fails (403, timeout, blocked), try these fallbacks in order:
   • WebSearch with query site:x.com "{handle}" latest to find recent activity
   • WebFetch on https://nitter.net/{handle} as an alternative Twitter frontend
4. If the account is suspended or does not exist, set twitter_last_post_at: ''.
5. If a date is found, convert to YYYY-MM-DD format. If the date is relative (e.g., "2 days ago", "Mar 10"), compute the absolute date relative to today.

2d: Check homepage domain

For each links.homepage URL (including any newly found ones):

1. If the URL is empty after step 2b, set domain_up_at: ''.
2. If the URL is present, use WebFetch on the homepage URL to check if it is reachable.
3. If WebFetch returns successfully and the site has real content, set domain_up_at to today's date.
4. If WebFetch fails with a connection error, DNS error, or timeout, set domain_up_at: ''.
5. If the site returns 403 but has content (e.g., Cloudflare challenge page with "checking your browser"), the domain IS up — set domain_up_at to today's date.
6. If the site redirects to unrelated domain parking, set domain_up_at: ''.

2e: Search for wind-down news

Use WebSearch with query "{stablecoin name}" stablecoin shutdown OR "wind down" OR abandoned OR depeg to check if the project has been discontinued.

If clear wind-down news is found (project shutting down, permanently depegged, team abandoned):

1. Read the current long_description value.
2. If long_description is empty (''), create a new value. If it already has content, append to it.
3. Add a ## Status section with a brief summary of the situation and source links. Example:

long_description: |
  ...existing content if any...

  ## Status

  The project announced wind-down in January 2026. The team ceased operations and
  the token depegged permanently. [Source](https://example.com/article).

4. Use the Edit tool to update long_description in the YAML file.

Important: Only add status information that is clearly documented. Do not fabricate or speculate. If unsure, skip this step.

2f: Compute marked_dead_at and information_found_missing_at

marked_dead_at — set to today's date only if:

• We had a known-good homepage URL (non-empty links.homepage before step 2b, or clearly found via search) AND domain_up_at is empty (domain is confirmed down), OR
• We had a known-good Twitter URL AND twitter_last_post_at is non-empty AND the date is more than 6 months before today

Never set marked_dead_at just because information is missing. A deleted/suspended Twitter alone (with homepage up) does NOT trigger dead. Missing links that couldn't be found do NOT trigger dead.

information_found_missing_at — set to today's date if:

• After step 2b, both links.twitter and links.homepage are still empty (no way to check liveness), OR
• All check attempts returned inconclusive results (everything was blocked/timed out)

If at least one check succeeded (domain confirmed up, or twitter date extracted), leave information_found_missing_at as empty string.

2g: Write checks to the YAML file

Use the Edit tool to add the checks section to the YAML file.

For single-entry files, append as the last key at top level:

checks:
  twitter_last_post_at: '2026-03-10'
  domain_up_at: '2026-03-17'
  marked_dead_at: ''
  information_found_missing_at: ''

For multi-entry files, add checks: as the last key within each entry block, indented at the entry level (2 spaces):

entries:
- name: Example Token
  short_description: ...
  links:
    homepage: https://example.com
    twitter: https://x.com/example
  contract_addresses:
    - chain: ethereum
      address: '0x...'
  checks:
    twitter_last_post_at: '2026-03-10'
    domain_up_at: '2026-03-17'
    marked_dead_at: ''
    information_found_missing_at: ''
- name: Another Token
  ...
  checks:
    twitter_last_post_at: ''
    domain_up_at: ''
    marked_dead_at: ''
    information_found_missing_at: '2026-03-17'

YAML formatting rules:

• Always quote date values with single quotes: '2026-03-17'
• Always quote empty strings: ''
• Maintain 2-space indentation matching the rest of the file
• Do not reformat or reorder any existing keys
• Place checks as the last key at its level

Step 3: Verify results

After all 8 subagents complete:

1. Use Grep to search for checks: across all YAML files — confirm all files were updated.
2. Use Grep to count:
   • marked_dead_at: entries that are non-empty (confirmed dead stablecoins)
   • information_found_missing_at: entries that are non-empty (needing manual review)
   • domain_up_at: entries that are non-empty (confirmed live domains)
   • twitter_last_post_at: entries that are non-empty (confirmed twitter activity)
3. Spot-check 3-5 files from different batches by reading them to verify correct formatting.
4. Report a summary table to the user:

Troubleshooting

Twitter/X blocks all requests

If WebFetch consistently returns 403 or empty content for X.com URLs:

• Fall back to WebSearch with query "{twitter_handle}" latest tweet to find cached or third-party reports of activity
• Try Nitter mirrors: https://nitter.net/{handle} or https://nitter.privacydev.net/{handle}
• Check CoinGecko page for the stablecoin (often shows social links with activity indicators)

Domain returns 403 with Cloudflare

This is common. If the WebFetch response contains "Cloudflare" or "checking your browser", the domain IS up. Set domain_up_at to today.

Rate limiting

If WebFetch starts failing due to rate limits, the subagent should note which files were not fully checked. These files should get information_found_missing_at set so they can be retried later.

Existing checks section

If a file already has a checks: section and recheck mode is off, skip it entirely. If recheck mode is on, replace the existing checks block with freshly computed values using the Edit tool.