docs(r3): §7.6.1 log intra-cadence tripwire reading 1.56:1

[briansrls]

Summary

Adds an intra-cadence tripwire reading row to docs/r3-program-plan.md §7.6.1.

• Reading: I:D = 84:54 ≈ 1.56:1 over 466 merged PRs (window 2026-04-30 → 2026-05-07).
• Context: same 7-day window as Wave 3 (R3 Debt-Paydown wave 3 — 7-day velocity-tripwire reading #2097, 1.79:1), advanced ~3.5h. D-side grew 47 → 54 while I-side held at 84. Continued dissolution-side accrual confirmed.
• No 3:1 invariant breach.

User-requested intra-cadence check; logged per Director's earlier readings-log discipline (#828 #issuecomment-4394527814).

Debt receipt

No debt introduced; no debt retired. Readings-log entry only (paydown-lane meta-doc edit; §7.6 is Debt-Paydown owned mechanism #2).

Test plan

• cargo fmt --all --check — no-op (no Rust touched)
• Markdown table renders cleanly
• Counts add to total: 84+54+328 = 466 ✓

[briansrls]

Review metadata

• Provider / model: claude / claude-opus-4-7
• Commit: e781043d · Trigger: schedule
• Comparison: origin/main @ a2f1fc21 ... review/pr-2115-e781043d @ e781043d
• Thinking: 7.6s wall

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APPROVE — docs-only addition logging a tripwire reading; no code, no substrate impact, no invariant surface touched.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: e781043d · Trigger: schedule
• Thinking: 126s wall

---

Non-blocking — Strengths

• docs/r3-program-plan.md The docs-only update is bounded to §7.6.1 and does not introduce a new authority or contradict the thesis/invariants.

ROADMAP — Verified

• R3 velocity tripwire: The added intra-cadence reading records method/source and remains below INVARIANTS.md P5(c)'s 3:1 Director-review threshold.

✅ No blocking concerns.

[briansrls]

Review metadata

• Provider / model: openai-pro / gpt-5-5-pro
• Commit: e781043d · Trigger: manual
• Comparison: main @ a2f1fc21 ... session/gentle-newt-665 @ e781043d
• Conversation: View conversation

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1. Story of the diff

This PR updates docs/r3-program-plan.md §7.6.1 by recording a newer intra-cadence velocity-tripwire reading ahead of the existing May 7 row. The new table entry logs a trailing 7-day I:D ratio of 1.56 : 1 over 466 merged PRs, explicitly marking the method as a title-only heuristic and the tripwire as not fired: docs/r3-program-plan.md:681 — | 2026-05-07 (intra-cadence) | 2026-04-30 → 2026-05-07 (trailing 7d) | **1.56 : 1** | 466 merged | Title-only heuristic; same window as prior row, advanced ~3.5h | NO | gentle-newt-665 intra-cadence check |.

It then updates the explanatory sentence below the table to incorporate the new reading without replacing the earlier reversal narrative: docs/r3-program-plan.md:685 — Intra-cadence re-check at 1.56:1 confirms continued dissolution-side accrual (D went 47 → 54 while I held at 84). The load-bearing effect is documentation-only: the R3 debt-paydown program now has a fresher non-breaching tripwire receipt and a count-level explanation for why the ratio improved.

2. Invariant categories

1. LAYER MODEL (substrate vs implementation).

N/A — diff is documentation-only; it does not touch Dag, substrate declarations, cross-pass types, or Rust implementation APIs. The only changed lines are the R3 program-plan table row at docs/r3-program-plan.md:681 and adjacent prose at docs/r3-program-plan.md:685.

1. INVARIANTS.md + modeling-discipline.md.

Compliant — the relevant principle is Progress Is Dissolution / tracked tripwire discipline. The new row records the window, ratio, sample size, methodology, fire status, and source in one place at docs/r3-program-plan.md:681, and the prose at docs/r3-program-plan.md:685 explains the ratio movement by the underlying I/D counts rather than leaving the reading as an unexplained number.

1. CODING.md.

N/A — no Rust code, helpers, APIs, naming surfaces, result shapes, or impurity boundaries are changed. The Markdown table preserves the existing latest-first data shape by inserting the newer intra-cadence row above the prior May 7 reading at docs/r3-program-plan.md:681.

1. TESTING.md.

N/A — docs-only telemetry update; no executable behavior, compiler interface, lens output, or regression-prone code path changed. This does not add or promote a behavioral-completeness claim that would trigger cementing tests.

1. LOCKED DESIGN DECISIONS.

N/A — the diff does not add, edit, or contradict a locked design decision; it only appends a measurement receipt and explanatory sentence in the R3 program plan.

1. TRACKED vs UNTRACKED DEBT.

Compliant — no new scaffold, TODO, shim, or temporary implementation shape is introduced. The PR strengthens tracked-debt visibility by adding a bounded tripwire receipt with methodology and source at docs/r3-program-plan.md:681, plus the dissolution/introduction count delta at docs/r3-program-plan.md:685.

3. Verdict

APPROVE

The PR is a narrow documentation receipt for the R3 velocity tripwire and does not mutate substrate, implementation, tests, or locked design surfaces. The new reading is bounded by methodology/source metadata and the explanatory prose ties the improved ratio to concrete I/D count movement, so I do not see an invariant or debt-tracking issue.