[issue-3288][slice-2/6] De-ledger docs/architecture line-edit pages

[james-in-a-box]

Sentence-level de-ledgering of the architecture pages that need edits rather than a rewrite. Strip slice/TASK ids; rewrite "used to… now…" into present-tense current behavior; keep issue links that justify the current design, reframed as rationale.

Base PR: #3317

What's in this PR

Commits (3):

• Persist BRC history for slice-2 (Slice PRs are missing analysis/plan docs and all BRC history; need a 'context' PR for refine+plan phases plus per-slice BRC in each slice PR #2548)
• docs: de-ledger overseer-calibration-corpus heading
• implement(Documenter agent + docs: snapshot of current state, not a ledger of changes #3288): de-ledger docs/architecture pages (slice-2)

.egg-state/brc-history/3288-implement-slice-2.json | 684 +++++++++++++++++++++++++++++++++
 .egg-state/brc-history/3288-implement-slice-2.md   | 853 +++++++++++++++++++++++++++++++++++++++++
 docs/architecture/brc-memory.md                    | 306 +++++++--------
 docs/architecture/context-discipline.md            |  23 +-
 docs/architecture/orchestrator.md                  | 666 +++++++++++++-------------------
 docs/architecture/overseer-calibration-corpus.md   | 111 +++---
 docs/architecture/upstream-routing.md              | 138 ++++---
 7 files changed, 2069 insertions(+), 712 deletions(-)

This slice

De-ledger docs/architecture line-edit pages

Files affected:

• docs/architecture/brc-memory.md
• docs/architecture/orchestrator.md
• docs/architecture/overseer-calibration-corpus.md
• docs/architecture/upstream-routing.md
• docs/architecture/context-discipline.md

Tasks (2) + acceptance criteria

• task-2-1: De-ledger docs/architecture/brc-memory.md: replace "Introduced by BRC consensus: replace agent-held waits with deterministic event-pump + durable agent memory (durable fix for #2906) #2908, slice-1.", "Slice-1 lands the writer… lands in slice-3. Slice-4 flipped the default…", "Added in BRC context discipline: protected directive root + queryable environment, bounded by a deterministic threshold reseed #3200 slice-5." with present-tense descriptions of the current BRC-memory mechanism. Keep an issue link only where it explains why the design exists.
  • Acceptance criteria: - brc-memory.md describes the current mechanism with no slice-NUMBER / "lands in slice-N" / "flipped the default" chronology; retained links read as rationale.
• task-2-2: De-ledger docs/architecture/orchestrator.md (highest density) and the remaining lower-density architecture line-edit pages (overseer-calibration-corpus.md, upstream-routing.md, context-discipline.md). Convert the behavioral sections keyed on slice/TASK ids ("slice-4 TASK-4-5", "TASK-4-1 used to clear only…") and the slice-1→slice-4 "slice lifecycle" change-log section into descriptions of current behavior; strip slice/TASK ids and "used to… now…" narration from the others; keep issue links only as rationale.
  • Acceptance criteria: - orchestrator.md "slice lifecycle"/rollout narration is replaced by a current-behavior description; no slice-N/TASK-N references remain except reviewer-accepted live-machinery naming. - overseer-calibration-corpus.md, upstream-routing.md, and context-discipline.md carry no slice/TASK ledger references; retained links are rationale.

Stack

• Position: slice 2 of 6 in pipeline issue-3288
• Base PR: Documenter snapshot-not-ledger framing + corpus cleanup (#3288) #3317
• Stacked on top of egg/issue-3288/slice-1