--- title: "Yield Intelligence Changelog" canonical: "https://pharos.watch/methodology/yield-changelog/archive/v4/" description: "Yield Intelligence Changelog - Pharos methodology version history." --- # Yield Intelligence Changelog [All versions](https://pharos.watch/methodology/yield-changelog/) ## v4.9 - Publish-safe retention and deterministic adapter quarantine **Effective:** 2026-03-24 Yield publication now preflights rankings payloads before mutating live rows, degraded runs retain prior rows instead of destructively pruning, and the two known-bad generic deterministic vault probes were quarantined from Tier 1 coverage. - Rankings publication is now validated before live row mutation, reducing DB/cache divergence risk on schema or publish-guard failures - Degraded runs retain prior current rows by skipping destructive cleanup instead of deleting rows while upstream inputs are impaired - dUSD and reUSD were removed from the generic ERC-4626 deterministic adapter set until protocol-specific readers exist, reducing false confidence in Tier 1 coverage Origin: Contemporaneous release record Commits: Commit provenance not recorded ## v4.8 - Explicit edge-case overrides for remaining high-signal lending markets **Effective:** 2026-03-24 A final selective pass added deterministic lending overrides for the remaining high-signal exact-symbol markets that were still blocked only by report-card coverage gaps or sub-C safety gating. - Polaris pUSD now resolves through a deterministic Silo v2 lending market override, fixing the prior bypass-only configuration gap - USDX, USDO, and USDM now use deterministic exact-symbol lending overrides rather than waiting on the generic dynamic discovery path - These explicit overrides bypass the normal C- safety gate only for a short named list of high-TVL or protocol-native edge cases, preserving the broader global discovery standard Origin: Contemporaneous release record Commits: Commit provenance not recorded ## v4.7 - Early NAV fallback support and deeper long-tail lending coverage **Effective:** 2026-03-24 Yield coverage widened again through lower but still curated lending floors, two additional protocol families, and price-derived fallbacks that can bootstrap younger NAV tokens before day 30. - Auto-discovered lending opportunities now accept single-asset pools down to $100K TVL and 0.10% APY, capturing still-meaningful long-tail markets without opening full dust-pool coverage - The curated lending allowlist now includes More Markets and SmarDex USDN, while Polaris pUSD can bypass the report-card gate through an explicit vetted edge-case override - Price-derived APY now annualizes from the oldest available price anchor between 7 and 45 days instead of requiring a strict 30-day sample, improving early coverage for newer NAV tokens Origin: Contemporaneous release record Commits: Commit provenance not recorded ## v4.6 - Rate-derived treasury expansion and broader lending discovery **Effective:** 2026-03-24 Yield coverage widened through new deterministic Treasury fallbacks plus a broader but still curated lending auto-discovery set for long-tail assets. - USYC and thBILL now participate in rate-derived Treasury fallback coverage alongside the existing BUIDL/USTB/YLDS/mTBILL/OUSG set - Auto-discovered lending coverage now recognizes additional curated protocol slugs already present in live DeFiLlama data, including Loopscale, Vesper, Lista Lending, Liqwid, Overnight, Lagoon, and NAVI Lending - The lending auto-discovery TVL floor was reduced from $1.0M to $0.5M to capture still-meaningful long-tail lending markets without opening the door to dust pools Origin: Contemporaneous release record Commits: Commit provenance not recorded ## v4.5 - Fail-closed source validation and retained-market benchmark continuity **Effective:** 2026-03-23 Yield sync now treats broken direct-source payloads and total deterministic on-chain outages as degraded inputs, while retained Treasury benchmarks preserve the last market-derived rate across fallback streaks. - Direct DeFiLlama yield fetches now degrade on invalid payloads or zero relevant stablecoin pools instead of being treated as a benign empty set - Runs now degrade when all configured deterministic on-chain sources fail in the same cycle, exposing that outage in rankings provenance - Retained `risk_free_rate` fallbacks preserve the last market-derived benchmark fields across degraded streaks, and rankings-cache publication now blocks on severe shrink versus the prior cache Origin: Contemporaneous release record Commits: Commit provenance not recorded ## v4.4 - On-chain rate bootstrapping and pipeline hardening **Effective:** 2026-03-20 Fixed a bootstrapping deadlock preventing all 13 Tier 1 vault configs from computing on-chain APY, plus DRY and performance improvements. - On-chain rate configs now emit a seed row when no previous exchange rate exists, breaking the bootstrapping deadlock that prevented Tier 1 APY computation since launch - buildOnChainSourceKey consolidated from 3 duplicate definitions into a single shared export - Pool pre-filter set allocations promoted from per-call to module-level for improved DL pool ingestion performance - Live safety hydration coverage ratio now uses active card count instead of total card count for accurate degradation detection Origin: Contemporaneous release record Commits: Commit provenance not recorded ## v4.3 - Wrapper-preserving ingestion and hydration hardening **Effective:** 2026-03-19 Yield ingestion now preserves wrapper-relevant pools through pre-filtering, separates deterministic history from curated pools, and hardens public hydration paths against partial safety or warning data. - DeFiLlama pool ingestion now retains single-exposure wrapper pools that are explicitly relevant via native or variant config even when upstream `stablecoin` flags are false - Deterministic on-chain rows now use `onchain:` source keys so previous-rate lookups and source-aware history cannot collide with curated pool UUIDs - Live `/api/yield-rankings` safety hydration keeps rows with `DEFAULT_SAFETY_SCORE` / `NR` when report-card coverage is incomplete instead of dropping yield coverage - Retained benchmark fallbacks stay marked as degraded, and malformed stored `warning_signals` payloads no longer fail `yield-history` requests Origin: Contemporaneous release record Commits: Commit provenance not recorded ## v4.2 - Source-aware history and confidence-weighted arbitration **Effective:** 2026-03-10 Yield rankings now preserve per-source history, retain benchmark provenance, and prefer higher-confidence sources when multiple candidates disagree. - yield_history now persists per-source rows with best-source markers instead of a single mixed best series - 7d and 30d APY metrics are computed from source-specific history, preventing source-switch contamination - Rankings now include provenance for benchmark freshness, safety coverage, source-switch state, and selection reasoning - Cross-source arbitration can reject divergent discovered or fallback sources when canonical sources disagree materially Origin: Contemporaneous release record Commits: Commit provenance not recorded ## v4.1 - Conservative LUSD Stability Pool source **Effective:** 2026-03-07 LUSD gained a deterministic B.Protocol / Liquity Stability Pool source that estimates only the LQTY incentive stream and labels that limitation explicitly. - Added direct on-chain LUSD source using Liquity Stability Pool deposits and CommunityIssuance totals - APR converts projected LQTY emissions to USD using CoinGecko spot price and excludes ETH liquidation gains by design - LUSD can now surface both B.Protocol Stability Pool and auto-discovered lending alternatives in the same ranking payload Origin: Contemporaneous release record Commits: Commit provenance not recorded ## v4.0 - Multi-source rankings and alternative-source transparency **Effective:** 2026-03-03 Yield rankings moved from single-source rows to per-source modeling, so each coin can expose both native and wrapper yield paths. - yield_data primary key changed to (stablecoin_id, source_key) with per-source rows - is_best now marks the highest-APY source per coin; non-best alternatives are retained - Tier 2 matching aggregates all valid sources (native map, wrapper map, symbol fallback) - /api/yield-rankings now includes altSources[] and UI exposes +N alternative source details Origin: Reconstructed from git commit history Commits: `b94e042`