cycle 8 docs: YOLO_NOTES ledger — fetchT clone() hardening, Cody-required proof test

2a75e80f347fccf74e73208248f790c3886dfc7f · 2026-09-23 19:29:57 -0700 · Steve

Records the res.clone() Proxy hardening + the Cody-required sequential
clone-after-read proof test (not just an asserted comment). Notes the
provider-agnostic money-path backlog is now fully exhausted across 5 cycles.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TouFkmUGKHtwqpZwgReVic

Files touched

M YOLO_NOTES.md

Diff

commit 2a75e80f347fccf74e73208248f790c3886dfc7f
Author: Steve <steve@designerwallcoverings.com>
Date:   Wed Sep 23 19:29:57 2026 -0700

    cycle 8 docs: YOLO_NOTES ledger — fetchT clone() hardening, Cody-required proof test
    
    Records the res.clone() Proxy hardening + the Cody-required sequential
    clone-after-read proof test (not just an asserted comment). Notes the
    provider-agnostic money-path backlog is now fully exhausted across 5 cycles.
    Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
    Claude-Session: https://claude.ai/code/session_01TouFkmUGKHtwqpZwgReVic
---
 YOLO_NOTES.md | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/YOLO_NOTES.md b/YOLO_NOTES.md
index 21dc560..3cbb6c1 100644
--- a/YOLO_NOTES.md
+++ b/YOLO_NOTES.md
@@ -215,3 +215,25 @@ Canonical apply order now: `004_marketplace → 005_apple → 006_contacts → 0
 **Cost:** $0 (local PG/tests + two Cody passes — the 2nd caught a real gap the 1st round would have shipped with).
 
 **Backlog:** Provider-honored idempotency key remains the only money-path item, live-only (CR-KYC blocked). Safe local money-path work now genuinely exhausted after 4 cycles (#4/#5/#6/#7/§5b#2) closing every provider-agnostic reconcilability/fail-closed gap Cody could find. Next cycle should pivot to a non-money reversible item.
+
+## /yoloforever CYCLE 8 (2026-09-23, yf-costa) — fetchT() clone() hardening, Cody-gated with a proof requirement
+
+**Decision:** Close the `res.clone()` gap Cody flagged as latent in cycle 6 — a naked `clone()` returned the RAW un-proxied Response, so a future retry-with-clone caller would get an unbounded body read. No current caller uses `clone()` (reconfirmed via grep) — hardening-before-it-bites, not a live bug.
+
+**Landed:**
+- Refactored `fetchT`'s Proxy into a reusable `wrap(r)` applied to both the original Response AND any `res.clone()` — a clone tees the same incoming stream + shares the abort signal, so an abort still aborts both readers.
+- Generalized coverage from `json()`/`text()` only to the FULL body-consuming method class (`arrayBuffer`, `blob`, `formData`, `bytes`) — a caller switching methods would otherwise silently lose the bound.
+
+**Cody gate — SHIP IT, with one required addition (not a rubber stamp of a small Proxy diff):** the code comment *asserted* "once either read completes, a second read draws from already-buffered bytes" (the safety argument for sharing one timer/`done()` across original+clone) but **no test proved that specific compound claim** — only individual body-method bounding was tested. Cody built throwaway probes (`/tmp/.../scratchpad/tee-probe.js`, `tee-abort-probe.js`) confirming it empirically against real WHATWG stream `tee()` semantics on Node 26.4.0, then required it be ported into the real suite as a red-goes-green guardrail instead of a trusted paragraph.
+
+**Added (Cody-required):** a real delayed-`ReadableStream` `Response`, `clone()` BEFORE any read, fully drain the ORIGINAL (clearing the shared timer), then assert the CLONE resolves **near-instantly off tee-buffered bytes** rather than re-stalling on the network with no timer left to bound it. Result: clone resolved in ~0ms after a 90ms original drain — claim proven, not just reasoned.
+
+**Cody also verified clean (no defect):** clone-of-clone doesn't double-wrap; clone-after-consumed throws synchronously (a caller bug, correctly NOT relabelled `PROVIDER_TIMEOUT`); `Reflect.get(target,prop,target)` still passes the correct receiver for brand-checked getters/Symbols after generalizing the body-method set; a mock missing a body method degrades to plain delegation.
+
+**Tests (+4, suite 135 → 139, all green):** clone reads through the wrapper + original still independently readable; a stalled clone body rejects `PROVIDER_TIMEOUT`; a stalled `arrayBuffer()` is bounded (full method class); the sequential clone-after-original-read proof.
+
+**FINAL DTD:** SHIP. Provider-agnostic hardening backlog (#4/#5/#6/#7/§5b#2 + clone hygiene) now FULLY closed.
+
+**Cost:** $0 (local tests + one Cody pass, which included Cody running its own empirical Node scripts to verify a claim before ruling — not just reading code).
+
+**Backlog:** Provider-honored idempotency key is the only remaining money-path item, live-only (CR-KYC blocked). Safe local money-path work is now genuinely exhausted across 5 cycles. Next cycle pivots to a non-money reversible item — standing UX rules (sort+density, admin created-date) already confirmed compliant in cycle 7, so the search should widen: test coverage gaps, docs, or a fresh Cody-driven codebase audit for a new class of issue.

← 03b5617 costa-rica: harden fetchT's clone() + full body-method class · back to Costa Rica · costa-rica: add routes/admin.js coverage (was zero) + charac e57398f →