2026-09-07 signal-log inspection follow-up — three fixes that do not depend on sample size.
- providers/base.py: the signal-side 10σ outlier filter is now a bad-print filter. A >10σ
close-to-close bar is dropped only when the NEXT close snaps back ≥80% of the way
(OUTLIER_SIGMA / OUTLIER_REVERT_FRACTION); persisting moves and the newest bar are kept.
The unconditional rule deleted ~36 real M5 news bars/yr in the backtester (whole-frame σ)
and a different ~24/yr live (fetch-window σ) — e.g. the 2026-09-04 12:30 UTC NFP bar
vanished from M5+M15 and the 12:35 scan was a byte-identical repeat of 12:30. 3-yr Oanda
drops are now M5 2 / M15 1 / H1 0.
- providers/oanda.py: transient 401/5xx/network faults retry along RETRY_DELAYS_S=(2,5,10)s
under RETRY_BUDGET_S=45s. 11 boundary scans in two days had lost their primary frame at
xx:00:22–:26 UTC; one 2 s retry could not outlast the top-of-hour blip.
- signal_aggregator/_log_signal: a scan whose primary fetch failed logs scan_kind='failed'
(price 0, no signal); analyze_signal_log.parity_report skips it like 'blocked'.
- test_all.py: 466 tests (+6): retry ladder walks all delays, 5xx blip recovers on the third
attempt, retry budget stops the ladder, persisting/newest/partially-retraced 10σ bars kept,
failed-scan row kind, parity skip.
- CLAUDE.md: cleaning rule, retry ladder, failed scan kind, dated current-state note.
Book impact at $0.65 (rule 1 still passes everywhere, both halves positive):
12mo M5 557/+112.21/PF1.56 → 560/+108.81/1.54 M15 397/+73.93/1.53 → 398/+74.61/1.53 H1 identical
3yr M5 857/+161.3/1.53 → 870/+153.6/1.50 M15 1086/+148.7/1.37 → 1092/+151.9/1.38
H1 255/+70.5/1.98 → 253/+70.0/1.98 H4 113/+22.7/1.63 → 114/+21.7/1.59
Only trades on the previously-deleted event bars move; the pinned M5/M15 CSVs are no longer
byte-reproducible and should be regenerated at the next re-pin.
Claude-Session: https://claude.ai/code/session_01NDnBxJ2y8GRUM6ZNFJs1hZ
Owner decisions from the 2026-08-04 audit report:
- spread-in-exit-triggers: DECLINED (books stay comparable; ledger in
CLAUDE.md records the measured ~4-6% optimism).
- weekend clock: FIXED. The market week is Fri 17:00 -> Sun 18:00 New
York time, not Fri/Sun 22:00 UTC — during US DST the Oanda feed stops
at 21:00 UTC (measured: 159/162 summer weekends). All three weekend
implementations (providers/base, signal_aggregator, gpu_backtest
calendar filter) now share the NY-anchored rule; a new test sweeps
them hourly across both DST transitions and asserts agreement. No NTP
needed — the host clock was fine, the constant was wrong.
Ends the weekly false-"STALE DATA / feed lagging" hours (summer Fri
21-22 UTC, winter Sun 22-23 UTC).
- FB2_EMA_LO (delegated): kept as a research knob but crash-proofed —
an unparseable value degrades to the tuned default 0.5 with a warning
instead of killing every scan. Documented in CLAUDE.md.
Book gates: M15 12mo pinned book byte-identical (+78.7111R, 397
trades). M5 12mo drops exactly ONE trade (556 -> 555, +97.56 ->
+98.64R): a phantom whose signal fired on the final summer-Friday bar
(decision 21:00 UTC = NY 17:00 market close) and was "filled" at
Sunday's reopen 49 hours later, -1.08R — an entry live trading can
never take. The backtest no longer contains it; live == backtest
parity improved. M15 unaffected because hour 21 is in its blocked set.
Suite: 341/341 green.
Claude-Session: https://claude.ai/code/session_01UnZkzeFcTu9agFg8BDh2tn
2026-08-04 Fable 5 QA audit. Three batches sharing one test file, all
verified by runnable repros before fixing, all gated below.
Batch C — telegram alert delivery (verified by h4 harness):
- Failed breach rescan shrinks the cooldown to 30 s instead of
silencing the symbol for 5 min; breach during cooldown is PARKED and
fired on the first tick after expiry (was dropped forever).
- Level cache keyed symbol→TF (M5 scans no longer wipe H1/H4 swing
levels within minutes); breach labels TF-qualified.
- Markdown alert sends get a plain-text fallback (mirroring _safe_edit);
fingerprint commits only when a message actually landed.
- Per-key asyncio.Lock closes the dedup TOCTOU between auto-scan and
breach sends (forced-interleave repro produced duplicate alerts).
- _start_scheduler respawns dead per-TF loops (was all-or-nothing).
- Clean WS close now backs off (was a zero-delay reconnect hot loop);
backoff resets only after a connection that received ticks; TD
iter_ticks fires on_connect on the first RECEIVED frame (invalid key
can no longer pin the backoff at minimum).
- Scan-failure logs carry the real traceback (was "NoneType: None").
Batch E — providers (verified by h5 harness):
- fetch_range: 3 consecutive chunk ERRORS raise instead of returning
silently truncated history (verified 731-day silent gap repro; also
covers 429 storms); pagination no-progress guard; head-truncation
ERROR log.
- Single-flight per (symbol,TF): 4 concurrent scans = 1 API call (was
4); cache records requested depth so a longer-lookback call refetches.
- Multi-bar forming/future tail fully dropped (was iloc[:-1] once).
- Oanda: malformed candles skipped, never 0.0-defaulted; cleaning drops
non-positive-price rows BEFORE OHLC repair; inf returns neutralized so
one corrupt bar can no longer disarm the whole 10-sigma filter.
Batch F — backtester internals (verified by h6 harness):
- NaN bar in a trailing window exits at the last valid bar (was NaN R
poisoning every metric); static-path TIMEOUT NaN guard;
compute_metrics excludes non-finite R loudly. Zero real-data exposure
(0 NaN rows in all 10 Oanda parquets) — defensive.
- fetch_history ERROR-logs pre-2026-07-08 cache files (cleaned-bars era)
when loaded for raw-path resolution.
Gates: suite 333/333 green; pinned M15 12mo book reproduced identically
(397 trades, +78.7111R) after E and after F; M5 HEAD-config baseline
reproduced identically (556 trades, +97.5604R) after F.
Claude-Session: https://claude.ai/code/session_01UnZkzeFcTu9agFg8BDh2tn
One class per provider (TwelveData, Oanda, Tiingo), all subclassing
BaseDataProvider which owns cache, validation/cleaning, freshness +
boundary guarantees, fetch_range pagination, and streaming stubs —
subclasses implement only _fetch_raw. config.json data_providers.active
selects the live feed; data_provider.py / oanda_provider.py stay as
back-compat shims. Module 16 provider-abstraction tests (253 total green).
Claude-Session: https://claude.ai/code/session_01Mc7XKYyPySVXiUpcN82QEK
Harwinder Sekhon