---
type: reference
title: OMP Harness
description: "The omp harness as configured here: compaction chain arithmetic, per-model sampler routing, and the context-lean audits."
tags: [omp, harness, compaction, models-yml, context, samplers]
timestamp: 2026-10-18T00:00:00Z
---

# OMP Harness

The harness reaches the fleet through `~/.omp/agent/models.yml` (model
registry; single source of truth — there is no copy on the servers) and
`~/.omp/agent/config.yml` (roles, compaction, global samplers). Nothing in
this file is repo-managed; edits are harness-side only.

**Model ids are the StarCraft unit names (official 2026-10-08, on the wire
since 2026-10-09):** `frank-archon` (Dankserver), `frank-dragoon` and
`frank-zealot` (Dankclaw) — engine, port and card behind each id live on
[[frank-archon]], [[frank-dragoon]] and [[frank-zealot]] — formerly `frank-archon`, `frank-dragoon`
`frank-zealot`. The SERVICES keep the old names (units, scripts, env
files, runbook pages); pages written in the old era name the service,
the harness names the model. The wire now matches: each endpoint's
`/v1/models` answers with the Protoss name, so `models.yml`, the OpenWebUI
picker/grants, the homepage docs and the raw API all use one id per model
(see [[OpenWebUI]] for the grant re-key and the [[frank-archon]]
note on the endpoint echoing the requested name).

Verified 2026-10-18: `/v1/models` on 192.168.0.235:7770, 192.168.0.143:7770 and
192.168.0.143:7771 each answer with the unit name (`frank-archon`
`frank-dragoon`, `frank-zealot`).

## Compaction chain arithmetic (verify before ANY window change)

When a fleet endpoint's context grows past its harness-declared window, OMP
compacts by sending the conversation to a designated target model. Before
changing any `contextWindow`/`maxTokens`, verify the chain arithmetically —
a target whose window is smaller than the source's trigger point silently
breaks compaction.

Where the contract lives:

- `~/.omp/agent/config.yml` → `compaction.remoteEndpoint` (target URL:
  `http://192.168.0.143:7771/v1/chat/completions`, `config.yml:76`)
  `methodOrder` (`shake → snapcompact → soft → handoff → remote`
  `config.yml:77-82`), `thresholdPercent` (**95**, `config.yml:84`), idle
  settings (`idleEnabled`, `idleThresholdTokens: 100000`)
- `~/.omp/agent/models.yml` → per-model `contextWindow`, `maxTokens`
  `compactionModel` references
- Implementation: omp plugin
  `~/.omp/plugins/node_modules/@earendil-works/pi-coding-agent/dist/core/compaction/compaction.js`

The arithmetic (the coupled contract every endpoint's maxTokens comment
encodes). The authoritative `contextWindow`/`maxTokens` pair per model is on the
endpoint page ([[frank-archon]], [[frank-dragoon]], [[frank-zealot]]); what
follows is a **worked example** recomputed from the live files on 2026-10-18 —
a snapshot, not fleet state — with windows 200,000 / 155,648 / 200,704 and
maxTokens 16,384 / 45,056 / 16,384 (archon / dragoon / zealot):

1. **Source trigger** = `thresholdPercent × source contextWindow`; at the live
   95 % that is 190,000 (archon), 147,866 (dragoon), 190,669 (zealot). The
   bundle clamps the percentage to 1–99 and converts it to a token threshold.
2. **Output budget** = capped at the target model's `maxTokens` — every role
   here compacts to frank-zealot, so the budget is its 16,384.
3. **REQUIREMENT**: prompt (≤ trigger) + budget ≤ the target's per-slot
   window. **At 95 % this no longer holds**: 190,000 + 16,384 = 206,384 >
   200,704. The registry's own comments design around an 85 % trigger (archon:
   170,000 est × 1.03 + 16,384 ≈ 191,500 ≤ 200,704, `models.yml:49-56`), which
   does hold. While `config.yml` and those comments disagree, treat 85 % as the
   design point and re-run this arithmetic after ANY window change — a 400 from
   the compaction target mid-conversation is the symptom.
   (Historic 2026-10-05 pairs, at `thresholdPercent: 70`: 140,492 + 36,864 =
   177,356 ≤ 200,704 archon; 140,490 + 57,344 ≤ 200,700 dragoon; 140,492 +
   32,768 ≤ 200,704 zealot.)

Procedure (recompute from the LIVE files every time — windows rotate with
every swap; the block above is the 2026-10-18 state):

1. Read the `config.yml` compaction block + `models.yml` entries for source
   and target. Every endpoint's `contextWindow` comment carries its own
   arithmetic — read them.
2. Read the target checkpoint's `max_position_embeddings` (native window) —
   the served window may be a concurrency contract, not the native limit
   (`--parallel N` DIVIDES the pool; the per-slot number is the contract).
3. If native ≥ trigger + budget, reslice the pinned pool:
   `MAX_RUNNING × CONTEXT_LENGTH ≤ MAX_TOTAL_TOKENS` (the pin exists because
   the runtime's autofit leaves too little for deferred loads + prefill
   workspace; check `nvidia-smi` headroom — expect ~0.8 GB workspace margin).
4. Changes: host env (CONTEXT_LENGTH-style env tunables) via git →
   `./tests/run.sh` → deploy; harness `models.yml` directly (no repo copy).
5. Verify: `/health` 200, boot log's pool line, then a long-prompt probe at
   ≥ trigger height (the compaction-fit guarantee), then concurrent requests.

Known reconciliation trap: comments in models.yml have described compaction
as running "on the dankserver endpoint" while `remoteEndpoint` pointed at
dankclaw — the comment/config disagreed. The comments now name the real
target (`compaction.remoteEndpoint` = dankclaw :7771). **The config is
truth; fix comments in the same change.** A fresh instance of the same trap is
open 2026-10-18: every `maxTokens` comment still says "compaction fires at
85 % of the window" while `config.yml:84` sets `thresholdPercent: 95`.
`maxTokens` never changes for a reslice — it caps output; `contextWindow` caps
input. Boot-shape OOM laddering is a different problem
([[Llama Cpp Serving Sizing]]).

## Per-model sampler config (`compat.extraBody`)

`models.yml` has **no per-model sampler keys**. The global knobs are
`config.yml`'s `temperature`, `topP`, `topK`, `minP`, `presencePenalty`
`repetitionPenalty`, and a knob reaches the wire only when it is set — the
bundle guards each one with `!== void 0` (e.g. `minP!==void 0)e.min_p=t.minP`)
and this workstation's `config.yml` sets **none** of them. The 2026-10-05 note
that the unset default is `-1`/"not sent" is retired: there is no `-1`
sentinel, an unset key is simply absent. The per-model hook is
`compat.extraBody`:

**Why it works:** `applyOpenAIExtraBody` runs **last** in the
openai-completions builder — after `applyChatCompletionsCompatPolicy` —
`Object.assign(params, extraBody)`. So extraBody overrides global settings
and compat-policy output.

```yaml
compat:
  reasoningEffortMap:
    max: xhigh
  extraBody:
    temperature: 1.0
    top_p: 0.95
    top_k: 20
    min_p: 0.0
    presence_penalty: 0.0
    repetition_penalty: 1.0
    preserve_thinking: true
```

Use **wire names**, not OMP camelCase. Two traps:

1. **`preserve_thinking` is not user-settable as a compat key.**
   `qwenPreserveThinking` is auto-derived in `buildOpenAICompat` from the
   *auto-detected* `thinkingFormat` + local baseUrl, **before**
   `applyCompatOverrides`. Setting `compat.thinkingFormat: qwen` in
   models.yml does **not** enable it. Custom-named models (`frank-dragoon`)
   match no Qwen id pattern → use `extraBody: {preserve_thinking: true}`.
2. **Never put `chat_template_kwargs` in `extraBody`** where a compat policy
   also sets it — `Object.assign` is shallow and replaces the whole object,
   silently dropping the `reasoning_effort` kwarg the compat policy set.
   Top-level `preserve_thinking` is honoured by frank-dragoon
   ([[frank-dragoon]]). Live state 2026-10-18: frank-archon's `extraBody`
   carries `chat_template_kwargs: {enable_thinking, preserve_thinking}`
   (`models.yml:89-91`) and nothing else sets that object at that endpoint, so
   the shallow-merge hazard is latent rather than firing.

**Gotcha (retired 2026-10-17): silent greedy decode.** Earlier frank-dragoon
builds carried **no server-side sampler defaults**, so an absent
`temperature` decoded greedy while the endpoint looked configured. That era is
over — the endpoint now ships its own defaults ([[frank-dragoon]]), so an
absent temperature is no longer greedy. frank-dragoon's `extraBody` still
carries the same trio — consistent, not load-bearing. Treat any older "do not
drop it or you get greedy" wording as history.

**Reasoning-effort folding.** The set `reasoning_effort` accepts is a property
of the endpoint, not of the harness: [[frank-dragoon]] and [[frank-zealot]]
raise on anything outside `xhigh|medium|low`, while [[frank-archon]] does not
gate the set. Every endpoint's `reasoningEffortMap` folds all harness levels
onto whichever set that endpoint ships; a role whose
level is unmapped fails on its FIRST request, and the failure names Jinja,
not the model.

### Verify the exact wire body (echo-capture)

Don't trust the YAML — capture what OMP actually emits:

1. Echo server on `127.0.0.1:18099` that dumps the JSON body to a file and
   returns a canned `chat.completion` (include `reasoning_content` so
   thinking paths exercise).
2. Copy the **real** models.yml into a throwaway profile with only the
   baseUrl swapped:
   ```bash
   sed 's|http://<host>:7770/v1|http://127.0.0.1:18099/v1|' \
     ~/.omp/agent/models.yml > ~/.omp/profiles/wiretest/agent/models.yml
   ```
3. Run and inspect:
   ```bash
   omp --profile wiretest --model "<provider>/<model>" -p "hi" \
     --no-tools --no-session --no-extensions --no-skills --no-rules
   jq 'del(.messages, .tools)' last-body.json
   ```
   Confirm every intended field is present with the right value.

**Verify a field is *honoured*, not just accepted** — unknown fields often
return 200 anyway. Prove behavior with a **prompt-token delta**: replay an
assistant turn carrying a long `reasoning_content`, then compare
`usage.prompt_tokens` with the flag true vs false. A large delta means the
field changed template rendering; zero delta means it was ignored.

Cleanup: trash the probe profile and echo server (`profiles/.AGENTTRASH`)
never `rm`.

## Static-preamble audit ("the context feels bloated")

What loads statically every session (measure each, don't guess):

1. Repo rules file — `wc -c AGENTS.md` (baseline 2026-10-05: 72,179 B, ~18k
   tokens — historically the largest block; re-measured 2026-10-18: 89,723 B).
2. Skill index — only names+descriptions load; bodies are on-demand. Sum
   description bytes across all SKILL.md frontmatter:
   ```bash
   python3 - <<'EOF'
   import glob, re, os
   for root in [os.path.expanduser("~/.omp/agent/managed-skills")
                os.path.expanduser("~/.omp/agent/skills"), ".omp/skills"]:
       n=tot=0
       for sk in glob.glob(root+"/*/SKILL.md"):
           fm=re.search(r'^---.*?---', open(sk, encoding="utf-8", errors="replace").read(), re.S)
           d=re.search(r'description:\s*(.*(?:\n(?:\s{2,}.*)*)?)', fm.group(0) if fm else "")
           n+=1; tot+=len(d.group(1)) if d else 0
       print(root, n, tot)
   EOF
   ```
   Baseline 2026-10-05: 171 managed skills / ~38 KB descriptions + 9 user
   skills. Re-measured 2026-10-18 with the same glob: **87** managed
   `SKILL.md` + 9 user skills — the dedupe happened.
3. Memory lessons — `find ~/.omp/agent/memories -name 'MEMORY.md' -o -name
   'memory_summary.md' | xargs wc -c`. The injected block ≈ the largest
   MEMORY.md.
4. Harness/system prompt + tool schemas + CLI persona: fixed cost, ~20 KB;
   not prunable.

Known rot patterns:

- Near-duplicate auto-captures of the same lesson (three "authentik ORM"
  entries, the freetoken-build pair, the three job-runner skills) — dedupe
  via `manage_skill delete`/`update`.
- Corrupted captures containing stray CJK characters (`一团ly`, `等方法`)
  mid-sentence — a known defect of the auto-capture path; delete the corrupt
  copy, keep the clean one.
- Stale host/service names in consolidated memory (pre-rename
  `frank-default-large`) — the repo's AGENTS.md topology table is ground
  truth.

Fix strategy: AGENTS.md prose (measured runbook narratives) → move to
`serverAppConfigs-docs/LLM/` runbooks, keep laws + tables in AGENTS.md (the
repo's own docs-tree rule mandates this). Managed skills live in
`~/.omp/agent/managed-skills` (safe to edit); user-authored skills in
`~/.omp/agent/skills` are NEVER touched by tooling. Memory store edits:
stage removed captures to trash first (`~/.AGENTTRASH/YYYYMMDD-topic`).

Baseline to beat (2026-10-05): ~35–40k tokens of preamble — AGENTS.md ~18k,
skill index ~10k, lessons ~3.5k, harness ~6k. Proposed reductions: −12k
(AGENTS.md slimming), −3k (skill dedupe).

## Managed-skill library hygiene

Use when auditing, pruning, or consolidating `~/.omp/agent/managed-skills`
(the auto-captured skill store; the full index is injected into EVERY
session's context, so dead or duplicate entries are a permanent tax).

The static-context budget (measured 2026-10-05):

| Block | Size | Notes |
|---|---|---|
| `AGENTS.md` (repo) | 72,179 B ≈ 18k tok | biggest single item |
| Skill index (~173 skills) | ~40 KB ≈ 10k tok | names+descriptions only |
| Learned-lessons block | ~14 KB | can contain corrupted/duplicate captures |
| Harness system prompt + tool schemas | ~23 KB | fixed |

Re-measured 2026-10-18: the skill library is down to 87 managed skills, but
`AGENTS.md` has grown to 89,723 B — the dedupe landed, the slimming did not.

Audit procedure:

1. Build an inventory: per skill, name, mtime, body word count, description,
   first 12 headings (one pass, out to a file; read in pages).
2. Group into: retired-runtime (host/service gone; its runbook already lives
   in `serverAppConfigs-docs/LLM/`), verbatim-duplicate pairs/triples (same
   lesson captured twice — often the SAME DAY), same-lesson families
   (N skills = one procedure), keep.
3. Read full bodies of every merge candidate before proposing a merge;
   description alone proves overlap only for exact dupes.
4. Present A/B/C/D verdicts for user approval. NEVER execute before the
   discussion concludes — the user gates execution explicitly.
5. On approval: stage everything to trash first
   (`~/.AGENTTRASH/YYYYMMDD-<topic>/`), never rm. After merging: recreate
   the surviving skill via `manage_skill` update with body = superset,
   delete absorbed ones.

Known rot classes (this library, 2026-10-05):

- Same-day duplicate captures (freetoken-build-dankclaw vs
  freetoken-dankclaw-build; the three job-runner skills).
- CUDA-skill vs its self-declared HIP twin (pcie-link-capability-probe vs
  pcie-link-probe-hip-rdna4) → merge.
- Era ghosts: skills naming retired runtimes (freetoken, lucebox, r9v/
  radiance, old halogen-flash-server image, ik_llama, GLM-5.3 experiment).
- Skills contradicting user standing orders (live-bench-dashboard vs the
  2026-09-29 delete-dashboards order) — flag for user, don't assume.
- Memory store: corrupted captures with CJK noise from broken ssh commands;
  stale host/service renames.

Sizing verdicts that worked: bench family → 2 skills (harness vs
discipline), not one mega-skill; keep profiler/kernel-time attribution
standalone; fold go/no-go arithmetic skills into their probe skill
(heterogeneous-accelerator-split-triage → PCIe probe).

## Related

- [[Agent Docs and Edits]] — editing vault docs and hashline targets safely
- [[Command Center Dotfiles]] — the `~/.omp` repo deploy this config rides
- [[Llama Cpp Serving Sizing]] — the engine-side sizing the chain must fit
-  measuring the endpoints this config routes