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Ollie Technical Whitepaper

The full 9P filesystem reference has been moved to architecture-9p.md.

Store Federation

OLLIE_TOOLS_PATH is an ordinary filesystem path. Because the server speaks 9P and any remote instance can be mounted locally, this var can point at a remote directory with no code changes — the OS handles the proxying transparently.

Centralized tool distribution

Host one authoritative tool set and point all machines at it:

# On each client machine:
ollie-9p mount toolserver:9564 ~/mnt/toolserver
export OLLIE_TOOLS_PATH=~/mnt/toolserver/t

Set it in ~/.config/ollie/env for persistence:

OLLIE_TOOLS_PATH=~/mnt/toolserver/t

Tool Discovery

Tools are executables in $OLLIE_TOOLS_PATH (default: ~/.config/ollie/tools/). At session startup, all .meta sidecar files are scanned and a compact listing (name + one-line description) is injected into the system prompt.

Metadata format

Each tool has a .meta JSON sidecar file alongside the executable:

{
  "description": "Short description (used in system prompt listing).",
  "prompt": "## my_tool\n\nFull documentation shown when tool is loaded.",
  "args": {"type":"object","required":["path"],"properties":{"path":{"type":"string","description":"File path"}}},
  "tier": "cold",
  "readOnly": true
}

Field	Purpose
`description`	One-liner shown in tool listing
`prompt`	Full documentation injected when tool is loaded
`args`	JSON Schema for tool input parameters
`tier`	Result cacheability: `cold`, `warm`, or `hot` (default: hot)
`readOnly`	Safe for parallel execution with other read tools
`cmd`	Executable path or name override
`variants`	Conditional definitions for heterogeneous hosts

Runtime access

The full prompt for any tool is available on-demand:

echo 'file_edit' | 9p rdwr ollie/tools   # returns file_edit's full documentation

Adding a tool

Drop an executable and its .meta file in $OLLIE_TOOLS_PATH. The next session created will pick it up automatically. No restart required.

See architecture-tools.md for the full specification including host-conditional variants and privileged tools.

System Prompt Override

The default system prompt is compiled into olliesrv. To replace it — for models that need their own identity preamble — set the systemPrompt field in an agent config JSON to a file path:

{
  "systemPrompt": "~/.config/ollie/prompts/SYSTEM_PROMPT_QWEN.md",
  "prompt": ["$OLLIE_CFG_PATH/prompts/agent-coding.md"],
  "temperature": 0.7
}

The file is read at session creation time. If it doesn't exist, the embedded default is used. The override replaces only the base system prompt layer; the operational model (9P documentation), environment block, and agent-specific prompt commands are still appended on top.

Model-specific prompts live at ~/.config/ollie/prompts/SYSTEM_PROMPT_*.md. Create an agent config per model family and point systemPrompt at the appropriate file.

Context Inspection

The rendered context window for any session is readable at session/{sname}/agent/{aname}/context — the exact message array sent to the backend on the last turn. Combined with session/{sname}/agent/{aname}/systemprompt, this gives full visibility into what the model sees.

Predefined Workflows

When coordination logic is known in advance, a shell script can drive the entire write → review → test workflow using named sessions and statewait:

#!/bin/sh
cwd=${1:?usage: $0 <cwd>}

# Create named sessions with agent profiles
o write session/new "name=developer agent=developer cwd=$cwd"
o write session/new "name=reviewer  agent=reviewer  cwd=$cwd"
o write session/new "name=tester    agent=tester    cwd=$cwd"

# Discover agent names (first agent in each session)
agent_developer=$(o ls session/developer/agent | grep -v '^new$')
agent_reviewer=$(o ls session/reviewer/agent | grep -v '^new$')
agent_tester=$(o ls session/tester/agent | grep -v '^new$')

send() {
    sid=$1; shift
    aname=$1; shift
    o write "session/$sid/agent/$aname/prompt" "$*"
    # Block until agent returns to idle
    while [ "$(o read "session/$sid/agent/$aname/statewait")" != "idle" ]; do :; done
}

reply=$(send developer "$agent_developer" "Implement a function that parses a JSON config file.")

while true; do
    review=$(send reviewer "$agent_reviewer" "Review the following code. Reply LGTM if ready, or PTAL with feedback.

$reply")

    if ! printf '%s' "$review" | grep -qi "LGTM"; then
        reply=$(send developer "$agent_developer" "Revise based on this feedback:

$review")
        continue
    fi

    result=$(send tester "$agent_tester" "Test the following code. Reply Approved if all tests pass, or Rejected with details.

$reply")

    if printf '%s' "$result" | grep -qi "Approved"; then
        printf '%s\n' "$reply"
        break
    fi

    reply=$(send developer "$agent_developer" "Fix the following test failures:

$result")
done

session=developer o ctl kill
session=reviewer o ctl kill
session=tester o ctl kill

The script initializes the routing, but agents can discover other sessions via session/idx and write to their prompt files directly — coordination is a shared filesystem, not a master-slave topology. Each agent can use a different agent=, backend=, or model=.

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