coldpass

Stack-Cairn/K-brain

GitHub ↗ · How this check works

Per-setup public labels: Linux / Haiku: Works

Static status badge · SVG · read-only JSON. Embed with ![Coldpass status](https://coldpass.dev/badge/Stack-Cairn--K-brain.svg).

Works

Only older checks are saved; no current product test.

Answers apply to each recorded setup, revision and operation. Earlier observations remain in Run details.

Tested on Linux
PlatformHaikuLuna
Linuxyes

Linux / Haiku 5.5: yes · Oct 17, 2026 · 535fe423876c · claude-code / 2.1.300 (Claude Code)
Recorded operation: kn mcp serve · local stdio MCP start + initialize + tools/list

MCP
yes, local
Yes, runs locally
Needs keys or browser
None seen
Setup time
1 min 18 s to install, 12 s to first use
Issue
none found in recorded check

Safety: no observations were recorded for the selected revision. Functional results do not establish a safety result.

Repair history and test corrections
Current diagnosis: unknown · resolved

Coldpass condensed instruction text introduced newline controls rejected by the existing job schema before any model call. Job construction now normalizes instructional whitespace once, including repair context; exact original failure remains immutable. Default/repair schema regression passes.

Repair record fix-14393ab4c107736bee0f · current status JSON. Original run outcomes remain unchanged.

Failed run: Stack-Cairn/K-brain · Oct 16, 2026 · Our test failed; no repo verdict.

Test-repair rerun: Stack-Cairn/K-brain · Oct 16, 2026 · Not tested.

Run details

Haiku 5.5

Native agent · Checked operation passed

Checked operation kn mcp serve · local stdio MCP start + initialize + tools/list

Agent-reported scope: Start the K-brain MCP server with `kn mcp serve` over stdio and call tools/list (MCP initialize -> notifications/initialized -> tools/list). Returns built-in tools: bash, edit, read, write.

MCP server returned: k-brain · version dev.

MCP tools returned: bash, edit, read, write. Tool listing does not establish authenticated tool-call success.

Run details
run
Stack-Cairn--K-brain-claude-haiku-5-5-1792233356468014960
date
Oct 17, 2026
time to working
140.0s
product hosting / execution
Local stdio MCP server in the guest
recorded operation scope
product operation
model
claude-haiku-5-5
agent / version
claude-code / 2.1.300 (Claude Code)
platform
linux
reported cost
$0.008964
Recorded source
https://github.com/Stack-Cairn/K-brain
Tool transport
mcp-assigned-vm
Test version
readme-520bfd15730ba11f12f732859d1d8be557b2f38c2b58468f19f590c551dabe62
revision
535fe423876c3ac29c7b344e7002e2b5a16730a3
Whose fault: not assigned · resolved

What the agent did

Start the K-brain MCP server with `kn mcp serve` over stdio and call tools/list (MCP initialize -> notifications/initialized -> tools/list). Returns built-in tools: bash, edit, read, write.

Read README.md: Quickstart > Install (curl installer not used; the README's 'Building from source' path was used instead)
Checked go.mod (go 1.27.0) and mise.toml; no Go present in VM
Downloaded https://go.dev/dl/go1.27.0.linux-amd64.tar.gz and verified sha256 against https://go.dev/dl/?mode=json&include=all; extracted to /opt/go
Building from source > go install -trimpath -ldflags="-s -w" ./cmd/kn ./cmd/k-brain-computer (GOBIN=/opt/kb/bin, GOFLAGS=-mod=mod); rc=0
kn --version -> 'k-brain dev'
README 'MCP servers' / 'Headless use' tables: kn mcp serve; initialize + tools/list over stdio returned 4 tools
Symlinked /opt/kb/bin/kn to /usr/local/bin/kn; wrote .coldpass/probe.json, observed.json, report.json

run JSON · checker evidence · agent report + check · transcript excerpt · error excerpt

Earlier attempts (1)

Haiku 5.5

Native agent · Not tested

Checked operation /tmp/kn-bin/kn -version

Agent-reported scope: Built the kn CLI from source per README 'Building from source' (go build -trimpath -ldflags="-s -w" -o /tmp/kn-bin/kn ./cmd/kn) and ran 'kn -version', which printed 'k-brain dev' with exit code 0.

Run details
run
Stack-Cairn--K-brain-claude-haiku-5-5-1792207841950254179
date
Oct 16, 2026
time to working
108.0s
product hosting / execution
Local command in the guest
recorded operation scope
product operation
model
claude-haiku-5-5
agent / version
claude-code / 2.1.300 (Claude Code)
platform
linux
reported cost
$0.005284
Recorded source
https://github.com/Stack-Cairn/K-brain
Tool transport
mcp-assigned-vm
Test version
readme-d7385db4c550d6450cd4f7a027673c8ef032179188dfdf5561cf0652fc6e888a
revision
535fe423876c3ac29c7b344e7002e2b5a16730a3
Current diagnosis: unknown · resolved

Coldpass condensed instruction text introduced newline controls rejected by the existing job schema before any model call. Job construction now normalizes instructional whitespace once, including repair context; exact original failure remains immutable. Default/repair schema regression passes.

Repair record fix-14393ab4c107736bee0f · current status JSON. Original run outcomes remain unchanged.

Failed run: Stack-Cairn/K-brain · Oct 16, 2026 · Our test failed; no repo verdict.

Test-repair rerun: Stack-Cairn/K-brain · Oct 16, 2026 · Not tested.

Double-checks failed run: Stack-Cairn/K-brain · Oct 16, 2026.

Fix: fix-14393ab4c107736bee0f.

What the agent did

Built the kn CLI from source per README 'Building from source' (go build -trimpath -ldflags="-s -w" -o /tmp/kn-bin/kn ./cmd/kn) and ran 'kn -version', which printed 'k-brain dev' with exit code 0.

Read README.md Quickstart and 'Building from source' sections
Installed Go 1.27.0: curl https://go.dev/dl/go1.27.0.linux-amd64.tar.gz -> /tmp/go.tgz; extracted to /opt/gosdk
go build -trimpath -ldflags="-s -w" -o /tmp/kn-bin/kn ./cmd/kn (succeeded, ~70s, downloaded module deps)
/tmp/kn-bin/kn -version -> 'k-brain dev', rc 0

run JSON · checker evidence · agent report + check · transcript excerpt · error excerpt

No product verdict. Run record.