docs(agents): documentation exists for point of use

*Documentation Policy* rewritten: a page earns its bytes only if it changes what
the reader does next. Measurements are disposable — a rate for anything not
running and not being compared is destroyed, not filed in an Eras row or a
technique page. "It is the only copy" is explicitly NOT a reason to keep a fact.
`log.md` retired from the policy; the Runbook Index no longer promises a page per
retired endpoint (rollback is a commit, not a document).

*Key Lessons Learned* purged of the dead: the dual-R9700 board-swap narrative and
the layer-split/x4-pair experiment laws (no live endpoint uses either), the QSA
patch note and the retired Kairic/FastMTP traps, and the throughput figures inside
the laws that survive — the law stays, the number goes. Two lessons added, both
from this campaign's own failures: a verdict is a lead, the scout's and the tool's
alike; and never let a census decide what to keep, because a tool can say where a
fact lives but not whether anything needs it.

997 → 820 lines.

AGENTS.md

@@ -47,7 +47,7 @@ per attempt and no separate swap-history file.
   The managed skill library is distilled there one page per skill-cluster:
   `LLM/index.md` → *Cross-Cutting References*, plus `Operations/index.md`,
   `Agent/index.md`, and the Infrastructure/Dankclaw/FrankBook-Pro service
-  pages (`serverAppConfigs-docs/log.md` carries the wave plan and results)
+  pages. There is no `log.md`: the change diary was destroyed 2026-10-19
 - `tests/` — bats suite + Playwright e2e
 
 ## Git Workflow — trunk-based (fleet law, aligned 2026-10-18)
@@ -318,35 +318,36 @@ the next), so never report request #1.
 deletes the unit file from `/etc/systemd/system/`, not just the symlink.
 `mask` symlinks to `/dev/null` and is safe/reversible.
 
-## Documentation Policy (fleet law, 2026-10-18)
+## Documentation Policy (fleet law, 2026-10-19)
 
-**One fact, one owner.** A page owns exactly one thing — an endpoint, a
-service, or a technique — and every other file links to it with `[[Page]]`.
-Restating a shape, a digest, a port list, or a measured number in a second
-file is a defect: it is the next thing to go stale.
+**Documentation exists for point of use.** A page earns its bytes only if it
+helps whoever performs the next task — the shape to deploy, the flag that must
+be passed, the failure signature to recognise, the rollback to run. It is not a
+lab notebook and not a ledger. **Losing information is an acceptable, usually
+correct outcome.** Never let an orphan census ("this is the only copy of that
+fact") decide what to keep: sole custody of a useless fact is still useless.
 
-- **One page per endpoint, forever:** `serverAppConfigs-docs/LLM/<endpoint>.md`
-  — current shape, an **Eras** table (`window | payload | runtime | shape |
-  replaced because | rollback`), the **Laws** the endpoint taught, the wire
-  contract, and the files that own it. A payload swap edits the shape block
-  and appends one Era row. It never creates a page, and the retired era's
-  page goes to `.AGENTTRASH/` once its rollback path and its laws are in the
-  table.
-- **`log.md` records incidents and laws** — anything with a causal story
-  (why the host went down, why a knob resets at reboot, why the RAM was the
-  fault). A model swap is not an incident: it is an Era row and nothing else.
-- **`AGENTS.md` carries operator-critical numbers only** — port, context
-  ceiling, slot shape, unit/env/serve trio — plus the cross-cutting laws.
+- **The purpose test — before you write, and again before you keep:** would the
+  reader act differently because of this line? No → delete it.
+- **Measurements are disposable.** A rate or throughput figure (t/s, tok/s, ms,
+  acceptance %, a bench ladder, a measured MiB) for a payload, runtime, or
+  layout that is not running now and not being compared now is destroyed, not
+  filed — not in an Eras row, not on a technique page, not "preserved for
+  history". AI moves faster than this vault: the number is wrong before anyone
+  reads it, and a wrong number in a runbook gets believed. Keep the **law** the
+  measurement taught; drop the measurement.
+- **One fact, one owner**, every other file links with `[[Page]]`. The env file
+  beside the serve script is the authority for every live number; the endpoint
+  page is the authority for the shape and the wire contract.
+- **One page per endpoint:** current shape, **Eras** (`window | payload |
+  runtime | replaced because | rollback` — the rollback is a commit, not a
+  number), the **Laws**, the wire contract, the files that own it. A swap edits
+  the shape block and appends one row; the retired era's own page is
+  **destroyed** to `.AGENTTRASH/`, never merged into anything.
+- **`log.md` is retired** (2026-10-19: 2,380 lines destroyed). Git holds the
+  chronology. A causal law belongs to the page that owns the thing it governs,
+  or to *Key Lessons Learned* below if it is cross-cutting — never to a diary.
 - **Index pages are locators:** one row, one clause, no numbers.
-- **A measured number is written once:** in the env-file header beside the
-  serve script that consumes it, and in the endpoint page. Every other page
-  cites it by link.
-- Technique pages (spec decode, KV math, offload budgets, PP bandwidth) stay
-  technique pages: they stop carrying a per-endpoint throughput table or a live
-  shape, but a campaign ledger that exists nowhere else is owned by the page that
-  measured it. The defect is two pages carrying one figure, not a number living on a
-  technique page — move a figure only when an endpoint page or an env header is its
-  home; otherwise leave it in place and name the era it measured.
 
 ## Model Config (harness)
 
@@ -487,36 +488,10 @@ linked runbooks.
   6 set. AMD desktop platforms put one card on CPU root ports (atomics work) and the rest behind the
   chipset (usually not) — that asymmetry is what blocked TP=2 here. A one-card collective proves
   nothing: NCCL short-circuits at `world_size=1`. [[PCIe Link and Atomics]]
-- **That wall was physical, and a board swap removed it on 2026-09-20.** dankserver took a board
-  whose CPU lanes bifurcate to x8/x8 Gen5: both cards on root ports, every bridge `Routing+`, BOTH
-  endpoints `ReqEn+`. Bandwidth was never the constraint (a 27B TP=2 allreduce at batch 4 is ≈10 MB
-  per token-step, under 0.4 ms at Gen5 x8); the collective choice is — TheRock's RCCL builds lack
-  gfx1201 device code (`invalid device function`), which is why vLLM runs its R4D one-shot allreduce
-  here at all. Evidence matrix and the three-arm verdict: [[Dual-R9700-Cooperation]].
 - **When a GPU collective dies, read the runtime, not the framework.** The message that identified
   the cause came from `AMD_LOG_LEVEL=3` (`Pcie atomics not enabled, hostcall not supported` →
   `AQL dispatch failed!`), never from vLLM or RCCL — the env var costs one line and prints the
   failing HIP call with its return code. [[PCIe Link and Atomics]]
-- **Layer split is the no-collective path, on one vendor's cards and across two — and
-  `--override-tensor` is what cannot ride with it.** Layers go in order and only the boundary
-  activation crosses PCIe once per forward pass, so it works wherever a collective cannot be
-  dispatched (on an RCCL-less fork it beats tensor mode, which falls back to a butterfly allreduce),
-  and it is the cross-vendor answer too (a CUDA + Vulkan split held a real two-device graph). But
-  `--override-tensor <group>=<device>` sets `has_tensor_overrides()`, a REQUIRED term of the
-  scheduler's `pipeline_parallel` flag, and that flag sets `n_copies`: with `n_copies == 1` a
-  pre-allocated weight on a non-primary device has no backend and the graph aborts (reported with
-  the leaf's op name `(NONE)`). `=CPU` is the only override target that works — the CPU backend is
-  last in the list — and pure Vulkan changes nothing: the gate is the override, not the driver mix.
-  Pin the spec-decode drafter to one device; on a split its home is the card holding the target's
-  last layers. [[Llama Cpp Multi-Device Splits]] [[x4-pair-experiment]]
-- **A host↔3090 link at x4 measures 6.72 GB/s, and that is a design constraint, not a detail.**
-  Pinned H2D 6.72 / D2H 6.60 GB/s (≈85 % of the Gen4 x4 ceiling), pageable within 1 % of pinned —
-  the copies are LINK-limited, so the usual "pageable costs 2×" rule does not apply; the x4 lives in
-  the adapter or cable (card and port are both wider). For any engine that STREAMS weights across
-  it: a 3 MiB slab costs 474 µs, so a 111 GiB A3B model needing ~1.70 GiB of active experts per
-  token lands at 3.7 tok/s against 20.46 tok/s with the experts COMPUTED in host RAM
-  (`-ot exps=CPU`, where the link carries activations only). Streaming loses; RAM does not care.
-  [[x4-pair-experiment]]
 
 
 **ROCm / GPU**
@@ -530,7 +505,7 @@ linked runbooks.
   the destination, then copy the contents.
 - **mmap must stay on** for the big-PLE models: `--no-mmap` forces the ~50 GiB PLE table into
   anonymous memory → silent cgroup kill, with dmesg as the only evidence. mmap pages ARE page cache,
-  and pinning the PLE tensor with `-ot` cost 23 → 13.4 t/s. [[Llama Cpp Serving Sizing]]
+  and pinning the PLE tensor with `-ot` was slower than letting it page. [[Llama Cpp Serving Sizing]]
 - **HIP reads bare env vars** `TEMP`, `HOST`, `GPU_MAX_HEAP_SIZE`. Serve scripts export env files
   with `set -a`, so a tunable named `TEMP` leaks into HIP (`TEMP=1.0` sent the JIT cache to path
   `1.0` and segfaulted every load, fixed 2026-08-13 by renaming to `TEMPERATURE`). Never name a
@@ -545,9 +520,6 @@ linked runbooks.
 - **Flash-Next MTP heads do not load on any current loader** — they need full per-layer
   `blk.<il>.hc_attn_norm.weight` and ship only `blk.48` (verified 3×). Do not re-attempt without new
   loader support.
-- **QSA flash-attn assert:** `GGML_ASSERT(a-type == GGML_TYPE_F32)` on qwen4exp needs
-  `scripts/patches/qwen4exp-qsa-f32-mask.patch` — but only on the agentionai FAST layer set; the
-  kingjones STRIX set works unpatched. [[Llama Cpp Serving Sizing]]
 - **The GPU budget on Dankclaw is the GTT aperture, not the rocm-smi "dedicated" figure.** The
   Radeon 8060S (gfx1151) reports 116,732 MiB (`llama-server --list-devices`; `gtt_total` in
   `/sys/class/drm/card1/device/`), and the older "64 GiB, SVM-backed" lesson was already stale.
@@ -602,13 +574,11 @@ linked runbooks.
   `LimitMEMLOCK=infinity` — systemd is privileged and the value flows through podman to runc without
   any raise. Upstream halogen's own run lines pass NO `--ulimit` at all: copy vendor run lines
   before adding flags. [[frank-dragoon]]
-- **A GGUF's custom tensor type picks the runtime — read the histogram before promising a file to a
-  loader.** `Qwen3.8-27B-Q8_0_ROCMFPX_AGENT.gguf` is ftype 115 over 311 tensors of type 103
-  (`GGML_TYPE_Q8_0_ROCMFPX`), so stock llama.cpp and gufo refuse it at load and the fork was not a
-  preference but the only door. Counting tensor types out of the GGUF KV section takes one python
-  read and settles a runtime argument in minutes. Build identity matters as much as the fork: the
-  2026-08-25 ROCmFPX builds SIGSEGV in `ggml_compute_forward_set_rows` on this same file, so
-  `scripts/build-rocmfpx.sh` pins commit `36e9acd` by SHA. [[GGUF Compatibility]]
+- **A GGUF's custom tensor type picks the runtime — read the histogram before promising a
+  file to a loader.** A non-standard tensor type in the KV section makes stock loaders refuse
+  the file at load, so a fork can be the only door rather than a preference. Counting tensor
+  types takes one python read and settles a runtime argument in minutes; build identity matters
+  as much as the fork, so pin the commit by SHA in any build script. [[GGUF Compatibility]]
 - **Speculative-decode flags move as a SET.** Handing the fork `--model-draft` with no `--spec-type`
   (the naive way to build a "no MTP" bench arm) segfaulted at load, core dumped, no diagnostic. A
   baseline arm must strip `--model-draft` AND every `--spec-draft-*` AND `--spec-type`, or it
@@ -617,12 +587,6 @@ linked runbooks.
   exception kept ~26 GiB of weights resident on a 121 GiB box and pushed `available` to 3 GiB, so
   every later rate was suspect. Record the child pid, kill it in a `finally`, then prove `free` came
   back before believing a number — and kill by pid, never `pkill -f llama-server`.
-  [[LLM Bench Windows and Measurement]]
-- Retired-runtime traps that can come back: **Kairic Edge** needs
-  `third_party/composable_kernel/include/ck/config.h` generated manually (untracked, so `git clean`
-  removes it) and its greedy-argmax fastpath rejects non-greedy requests and reasoning budgets, so
-  re-test chat before production; the **FastMTP sidecar** must be commit `4df29be4` + the HauhauCS
-  patch, since stock binaries fail the draft load with a tensor-shape mismatch.
 
 **llama.cpp serving**
 
@@ -635,10 +599,10 @@ linked runbooks.
   `--spec-type a,b` chains in a fixed internal order (CLI order irrelevant) and the gate is
   `ctx_dft`: the ngram family is added unconditionally while `draft-mtp`, `draft-dflash`,
   `draft-dspark` and `draft-eagle3` all need a draft CONTEXT. So `draft-dflash,ngram-mod` is
-  legal (measured 2.6x the drafter alone on prompt-echo traffic) but `draft-mtp,draft-dflash`
+  legal and it wins on prompt-echo traffic, but `draft-mtp,draft-dflash`
   dies at load — *"context type MTP requested but model doesn't contain MTP layers"*. **A LEGAL
   chain can still lose on a recurrent model:** `draft-mtp,ngram-mod` on frank-dragoon's qwen35
-  hybrid measured −15 % prose / −7 % block-copy, because adding the ngram layer logs
+  hybrid loses, because adding the ngram layer logs
   `recurrent state rollback is not compatible with 'ngram-mod' - disabling rollback support` and
   MTP verification depends on that rollback. Measure chains per architecture, never by analogy.
   [[frank-dragoon]]
@@ -647,7 +611,7 @@ linked runbooks.
   declaring NO sliding window caches the whole window on `--spec-draft-device` and can OOM the
   first draft graph capture AFTER `/health` has answered. Read `sliding_window` out of the
   drafter's GGUF header before sizing, and prefer a skewed `-ts` over a context cut.
-  [[Llama Cpp Multi-Device Splits]]
+  [[Llama Cpp Serving Sizing]]
 - **A draft context bills its own f16 KV over the WHOLE POOL, not the slot**, plus its own
   compute buffers, so on a single-card endpoint that squeeze can cost more than the drafter
   wins. The MTP question is never "does the file carry the head" but what draft KV + buffers
@@ -664,21 +628,20 @@ linked runbooks.
   re-measure the balance after any batch change. The logical `--batch-size` is nearly free; a
   large-batch allocation can fail on BUFFER CONTIGUITY while totals still fit, which no totals
   model can see. A prompt shorter than the ubatch cannot see the knob at all — that is the
-  control that proves the knob, not the traffic, moved the number. The 2× R9700 split peaks at
-  512; the CUDA 3090 has no interior optimum up to 2048. When a bench IS ordered, A/B it by
-  restarting the SERVICE through a transient `FRANK_<SVC>_ENV_FILE` drop-in, never a scratch
-  port: one card holds one server. Ladders: [[frank-medium-llamacpp-dflash2]] and
-  [[frank-zealot]].
+  control that proves the knob, not the traffic, moved the number. The optimum is a property of
+  the backend, so re-find it after any device or payload change. When a bench IS ordered, A/B it
+  by restarting the SERVICE through a transient `FRANK_<SVC>_ENV_FILE` drop-in, never a scratch
+  port: one card holds one server.
 - **One `-ts` step is one LAYER, and a hybrid stack's layers are not the same size** (a DeltaNet
   boundary and a full-attention boundary can differ by ~1 GiB each with its own KV), so balance
   by measurement. An affine fit reproduces the deployed point and overstates the gaps in between.
-  [[Llama Cpp Multi-Device Splits]]
+  [[Llama Cpp Serving Sizing]]
 - **`ngram-mod` prints no startup banner.** The load log names `draft-dflash` and nothing for the
   matcher, so a chain can look unengaged while it works. Identify it behaviourally (`draft_n` > 0
   only where text repeats) or by the per-task `draft acceptance = ... mean len = ...` line. It
   costs no VRAM (a 64 MiB host-RAM hash table) and its window decides which traffic it can see:
   too short and it proposes on ordinary prose fragments, costing verification without acceptance.
-  [[Llama Cpp Multi-Device Splits]]
+  [[Llama Cpp Serving Sizing]]
 - **`--parallel` divides the pool, so MORE conversations cost WINDOW, and the per-slot number is
   the contract — not `ctx-size`.** `n_ctx_slot = CTX_SIZE / PARALLEL`, and llama.cpp refuses a
   prompt longer than the SLOT with a 400 even when the pool has room, so `models.yml`
@@ -793,17 +756,24 @@ linked runbooks.
   `curl -o FILE URL` exits 0 on HTTP 401/403 and writes the error body as the "artifact": a gated
   repo yielded three 153-byte shards with identical sha256 and a cheerful `DOWNLOAD_DONE` in 20
   seconds for 104 GiB. Use `-f`/`--fail-with-body`, compare each file's byte count to the Hub's
-  declared size, and check the LFS sha256 (`scripts/download-frank-medium-gguf.sh` does all three;
-  ad-hoc fetches tend not to). Gated repos 403 even with the host's HF token until that account
-  accepts the gate. [[Model Swap and Rollback]]
-- **A scout verdict is a lead, never a finding.** In the 2026-10-19 vault de-dup campaign six
-  read-only scouts worked the same pages: one classified era pages as stale *because* they
-  document retired payloads (that is an era page's content), one reported files that do not exist,
-  one reported duplications that grep disproved (`457.9 t/s` and the ping-RTT table are solo-held
-  by `Ethernet Bandwidth Math`), one cited a line number past the end of the file it judged, and
-  one drafted an Eras table with invented windows, payloads and rollback paths. Re-verify every
-  claimed duplicate, every claimed staleness and every quoted holder against the file and today's
-  fleet state before editing; a scout yield buys no evidence.
+  declared size, and check the LFS sha256 — the live `scripts/download-frank-*.sh` scripts do
+  all three; ad-hoc fetches tend not to. Gated repos 403 even with the host's HF token until
+  that account accepts the gate. [[Model Swap and Rollback]]
+- **A verdict is a lead — the scout's and the tool's alike.** In the 2026-10-19
+  documentation campaign six scouts worked the same pages and produced invented
+  bullet IDs, files that do not exist, "duplications" grep disproved, line
+  numbers past the end of the file they judged, and Eras tables with invented
+  payloads. The mechanical tool was worse: `scripts/port-census.py` built its
+  corpus from the directory containing the page under test, so each page was held
+  by *itself* and ten era pages reported "0 sole-record lines" — which reads as
+  "pure duplication, trash it". Nothing was cut on a verdict; every holder was
+  re-grepped and every tool re-measured before it was believed.
+- **Never let a census decide what to keep.** That same campaign then concluded
+  the era pages were irreplaceable because each held 14–63 sole-record lines —
+  wrong in the opposite direction: those were throughput figures for payloads that
+  no longer run. Point of use is the only ownership test, the operator applies it,
+  and 53 pages plus the 2,380-line change diary were destroyed as a result. A tool
+  can say where a fact lives; it cannot say whether anything needs it.
 
 ## Runbook Index
 
@@ -818,12 +788,13 @@ per-attempt page and no per-swap ledger anywhere else.
 | `frank-zealot` — llama.cpp (PrismML fork), RTX 3090 | `serverAppConfigs-docs/LLM/frank-zealot.md` |
 | `frank-tts` — cloned-voice speech, Dankclaw | `serverAppConfigs-docs/Dankclaw/Frank TTS.md` |
 | Dankclaw kernel posture (`iommu=pt` since 2026-10-18) | `serverAppConfigs-docs/LLM/dankclaw-iommu-translation-off.md` |
-| Deployment flow + incidents | `serverAppConfigs-docs/LLM/deployment.md` |
+| Deployment flow | `serverAppConfigs-docs/Architecture/Deployment Flow.md` |
 
-Retired **endpoints** (not payloads) keep their own pages — `frank-medium`,
-`frank-npu`, the pre-name Dankclaw/Dankserver eras — because no live page owns
-them; `serverAppConfigs-docs/index.md` is the locator for every page in the
-vault. Retired scripts live in `old/` and `.AGENTTRASH/`.
+There is no page for a retired endpoint and no change diary. A payload swap
+appends one row to the live endpoint's **Eras** table; when the endpoint itself
+dies, its page is destroyed. Rollback is a commit, not a document.
+`serverAppConfigs-docs/index.md` is the locator for every page that survives;
+retired scripts live in `old/` and `.AGENTTRASH/`.
 
 ## Why