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Pharos

Stability Index Changelog: v1 archive

Historical release evidence. Return to current versions and the complete history index.

What this controls

Stability Index Changelog: v1 archive version history

Use this changelog to trace how Pharos changed the related scoring, data-source, threshold, or interpretation rules over time. Entries record the contract active at each release; archived rules are retained so historical charts and citations can be read against the rules active at the time.

Primary references

Read the current methodologyBrowse the public docs archive

Latest version

v1.3Feb 26, 2026Reconstructed

Sample architecture and 24h average model

PSI moved to sample-first storage with daily snapshots and 24h average surfaced as the primary displayed signal.

Impact snapshot

  • Introduced stability_index_samples table and daily snapshot aggregation
  • API and UI switched to emphasize 24h average PSI
  • Historical backfill path adjusted for peak-deviation realism
v1.3Feb 26, 2026Reconstructed

Sample architecture and 24h average model

PSI moved to sample-first storage with daily snapshots and 24h average surfaced as the primary displayed signal.

  • Introduced stability_index_samples table and daily snapshot aggregation
  • API and UI switched to emphasize 24h average PSI
  • Historical backfill path adjusted for peak-deviation realism
Details

Impact notes

  • Introduced stability_index_samples table and daily snapshot aggregation
  • API and UI switched to emphasize 24h average PSI
  • Historical backfill path adjusted for peak-deviation realism
Reconstructed from git commit history.2 commits
  • 9508e29
  • ad75f4f
v1.2Feb 25, 2026Reconstructed

15-minute chained compute + depeg depreciation/dedup

Operational and methodological upgrade to live 15-minute PSI with chronic-depeg depreciation and per-coin deduplication.

  • PSI compute moved to chained 15-minute cron after stablecoin sync
  • Introduced chronic-depeg depreciation (grace 30d, decay 120d, floor 25%)
  • Active depegs deduped per coin (worst current bps, earliest start for age)
Details

Impact notes

  • PSI compute moved to chained 15-minute cron after stablecoin sync
  • Introduced chronic-depeg depreciation (grace 30d, decay 120d, floor 25%)
  • Active depegs deduped per coin (worst current bps, earliest start for age)
Reconstructed from git commit history.4 commits
  • 8acaa7d
  • a79049d
  • 2dfb975
  • 615256a
v1.1Feb 25, 2026Reconstructed

Current deviation semantics

Severity began using live current deviation rather than event peak deviation for active depegs.

  • Live severity became recovery-sensitive instead of peak-anchored
  • Backfill behavior later diverged and was subsequently tuned
Details

Impact notes

  • Live severity became recovery-sensitive instead of peak-anchored
  • Backfill behavior later diverged and was subsequently tuned
Reconstructed from git commit history.1 commit
  • 14c75e7
v1.0Feb 25, 2026Reconstructed

Initial PSI release

Launched PSI compute, API, cron persistence, and frontend integration.

  • Initial formula: 100 - severity - breadth - freezes + trend
  • Initial caps: severity 60, breadth 15, freezes 10
  • Condition bands introduced
Details

Impact notes

  • Initial formula: 100 - severity - breadth - freezes + trend
  • Initial caps: severity 60, breadth 15, freezes 10
  • Condition bands introduced
Reconstructed from git commit history.5 commits
  • c4c7caa
  • c21a6bd
  • 5eaf440
  • 6b3e7e5
  • a3f2b53