atif-make

Make ATIF v1.7 trajectories from agent logs — Claude Code, Codex, Copilot CLI, HAR captures, the SLEIGHT-Bench, ATBench and METR MALT datasets, Inspect AI eval logs, and transcripts published as Markdown rather than as the log they were made from.

Zero runtime dependencies, bar one optional extra for reading Parquet. Python 3.12+.

Install

uv tool install atif-make          # puts `atif-make` on your PATH

Or as a library in a project:

uv add atif-make

For a browser view of what you convert, see the companion transcript-viewer, which depends on this package.

uv tool install builds an isolated environment, so nothing lands in your project or system Python. To follow local edits instead, use uv tool install --editable .; to remove it, uv tool uninstall atif-make.

Running from a checkout without installing works too: uv run atif-make ....

atif-make ~/.claude/projects/my-project/session.jsonl   # convert one log

Commands

atif-make <file>                 convert (shorthand for `atif-make convert`)
atif-make convert <file>         convert one log
atif-make convert <dir|archive>  convert every log inside
atif-make convert <dataset>      convert every transcript in one file
atif-make formats                list supported input formats

Supported inputs

Most agents write two unrelated log shapes — what the CLI streams, and what it persists on disk — and they are not interchangeable. atif-make reads both.

sleight-bench reads the SLEIGHT-Bench benchmark, where each line holds a single Anthropic content block rather than a whole message, so one assistant turn spans several lines. Its transcripts open with a canary object asking that the data be kept out of training corpora; that line is skipped as a message and carried into the trajectory's extra, so the opt-out travels with the converted file instead of being dropped at the door.

atbench reads ATBench, a safety benchmark of tool-using agent trajectories where each one is labelled for whether the agent did something unsafe. Its two configs differ only in spelling — contents/id against content/conv_id — and both are read.

A row's parts carry three roles: a user request, an agent turn as a thought plus an action, and an environment reply holding what a tool returned. An action is either a tool call or the word Complete followed by the agent's final answer, so the ending is a message rather than a call to a tool named Complete. Thoughts and final answers frequently arrive JSON-encoded a second time, as a quoted string inside a string; those are unwrapped, but only when they really do decode, so a thought that merely opens with a quotation mark keeps it.

The labelling has no home in ATIF's own fields, so it travels in the trajectory's extra: label, risk_source, failure_mode, real_world_harm and reason. A tool whose description was tampered with keeps the original under _original_description in the agent's tool definitions — that is the whole mechanism of an indirect prompt injection, and it is preserved as it ships.

metr-malt reads METR's MALT transcripts, where a run is a tree rather than a list: each node carries one message and points at its parent, and a branch_id says which line of the run it belongs to. Messages are in OpenAI's older chat shape, with function_call rather than tool_calls, because these runs date from that scaffold.

Almost all of the tool use here is written into the message. The scaffolding has no structured call: it tells the model in its system prompt to write <bash>ls</bash>, runs what it finds, and hands the output back as an ordinary user turn wrapped in <bash-output>. Across one shard that is 6,961 calls against 78 in the structured function_call field, so reading only the structured field leaves a transcript showing markup where it should show a command, and the tool's output looking like something the user said.

The tools are read from the system prompt, which lists them — bash, python, submit, timeout, and rarer ones like describe_image — rather than from a list kept here. These transcripts are full of <i>, <b> and <h1> in ordinary prose, and a run may use a tool no such list would have known about; a run whose prompt is missing falls back to the names its own results reveal. A call left unclosed because the run stopped mid-write is still read as the call it was reaching for.

Most records hold one conversation with short offshoots hanging off it — an alternative continuation sampled at some step, sometimes followed by a rater scoring what it was worth. Those offshoots are the reason the dataset exists: MALT publishes the same runs five times over, each with the chain of thought altered a different way, so what branches off a step is what is being compared against it. Each is kept on the step it branches from, in that step's extra, with the rater's scores where there are any — they arrive in a call's arguments with nothing in the message at all, so reading only the text would lose them.

A few records hold several whole conversations at once: an advisor briefing an agent, the agent working, and raters scoring it, each with its own system prompt and its own root, interleaved in one list of nodes. Splicing those into one would invent a run that never happened, so they are separated by the root each node climbs to, the longest becomes the trajectory, and the rest travel as subagent trajectories.

The dataset ships as Parquet. Reading it needs the parquet extra (uv tool install "atif-make[parquet]"); nothing else here does, so the package stays dependency-free for every other format. Splitting a shard is the only step that needs it — what comes out is ordinary JSON.

transcript-markdown reads a transcript that was rendered for a person rather than kept as a log. Some corpora publish only that: a bucket of 136 of these prompted the parser, each a half-megabyte document with no JSON anywhere near it. Two renderings exist and both are read — one writes the assistant at level three with each argument as a bullet, the other at level two with the arguments as a JSON object and the tool's answer arriving as a user turn that opens **tool_result:**. Reading that second one naively puts the machine's words in the person's mouth in every transcript that uses it.

Only three headings are structure. Everything else that looks like one is content, because these documents are full of writing about documents: ## Hypothesis, ## TL;DR, a file being written that has headings of its own. One held 1,032 headings inside fenced code alone.

Two things in the real corpus cost more than the rest of the format put together, and both are now fixtures:

• A fence closes only with one at least as long. A document quoting a fenced block wraps it in four backticks — 1,881 times across 121 of the 136 files. Treating every fence alike walks the tracking out of step, and headings inside quoted text start being read as structure.
• A rule drawn with tildes is not a fence. Markdown allows a tilde fence; these documents never use one, and command output is full of ~~~~~~~~ as a separator. One such line opened a fence that swallowed the next 1,507 lines of its transcript.

Reasoning folded into <details><summary>Thinking</summary> is read as reasoning rather than as speech — 3,260 blocks in that corpus — including where the rendering never closed the disclosure.

What is lost is what the rendering lost: token counts, timestamps, model names and tool call ids were never written down. Ids are assigned so a result can be attached to the call it answers.

inspect-eval reads Inspect AI logs, which is where most agent transcripts in control and evaluation research actually live: BashArena, control-arena and MonitoringBench all run on it. A .eval is a zip of JSON — header.json saying what was run against what model, and a samples/ directory holding one run of one task each, with its messages, its events and its scores.

The messages are the transcript. Inspect gives every call an id and every result the id it answers, so a call and its result are joined by what the log says rather than by where they sit. Large content is stored out of line and referenced as attachment://<hash>; those are resolved, because a transcript that keeps them reads as a list of hashes.

Two things are kept beyond the conversation, because for a control corpus they are the point of the run: what the scorers said, and what the task was — the mode (attack or honest), the main and side task descriptions, the setting. Token usage is recorded per model for the whole sample rather than per message, so the totals come from what the log counted, and name the models that did the work.

A .eval is a zip, which makes it look like an archive to anything sniffing by content. It is not: extracting one gives JSON files that mean nothing on their own, so it is excluded from archive handling by name.

A file that holds many transcripts

ATBench is published as one JSON array of a thousand trajectories rather than a thousand files. That is a container, like a zip, so it is treated as one: the file is split into a transcript per file and each is converted separately, into an output directory.

atif-make convert test.json -o converted/     # 1000 transcripts -> 1000 documents

Names carry the dataset's own identifier (test-00007-unsafe_003923_aa62fc1a), so a converted document can be traced back to the row it came from. Asking to convert such a file as though it were a single transcript is refused rather than answered with the first of a thousand.

The parser was built against all 86 transcripts in the dataset, not the published spec alone, which is how the three places they disagree came to light: a tool result can be a list of content blocks rather than a string, cwd is documented as required but is sometimes absent, and a transcript can end on a tool call that never got a result. All 86 convert with no loss and pass the reference validator.

Directories and archives — .zip, .tar, .tar.gz, .tgz, .tar.bz2, .tbz2, .tar.xz, .txz — are read as containers: every log inside is found and converted. That closes the loop on --bundle — the zip atif-make hands you to send someone opens again in atif-make, images and all.

Archives are extracted to a temporary directory, once per run. Members naming absolute paths or climbing out with .. are refused rather than quietly sanitised, and an archive that expands past 8 GB or 20,000 entries is rejected outright.

Format is detected from content, never from the extension. atif exists so a trajectory someone sends you opens like anything else — it is loaded, not reparsed, and unknown fields from a newer ATIF minor version are dropped rather than rejected.

What it gets right

These are the things that are easy to get wrong, and that silently corrupt a trajectory when you do:

Split messages. Claude Code writes one API response as several JSONL lines that share a message.id — thinking, text, and each parallel tool_use arrive separately, with the same usage object repeated on every line. Treating those as separate turns inflates step counts and multiplies token totals. atif-make coalesces them and counts usage once.

Out-of-order tool results. Parallel calls come back interleaved, and a slow call can return several turns after it was issued. Pairing results to calls by position drops some and misattributes others. atif-make pairs by tool_use_id.

Byte-capped detection. A JSONL preamble (hook events, rate-limit notices) can push the identifying line kilobytes into a file. atif-make scans whole lines.

Subagent structure. Claude Code links a delegated agent through a .meta.json sidecar (toolUseId) and an agentId field on the result line — not through anything in the result text. atif-make links by call id, so refs actually resolve instead of leaving orphaned subagents.

Delegation is in the sidecar, not the directory. Every subagent of a session is written into one flat <session>/subagents/ directory whatever its depth; the tree is parentAgentId, which names the subagent that spawned this one and is absent when the main thread did. Reading the directory is not reading the tree: a session where a subagent delegated in turn comes out as one wide row of subagents that nothing refers to, because their spawning call is in another subagent's log rather than the session's. Measured on a real three-level session of fourteen subagents, that is eleven of the fourteen.

So atif-make nests them by parentAgentId and links each parent to its own children by the sidecar's toolUseId, which is the only link that works below the main thread. A subagent is named for its whole chain — <session>.<agent-id>.<agent-id> — and the name is final before any ref to it is written, because a subagent writes refs to its own children before its parent ever sees it; a parent that renamed it afterwards would leave every ref below the first level pointing at nothing. The spec does not catch either fault — it asks that ids be present and unique among siblings, not that a ref resolves — so the guards are parser tests.

Claude Code stops handing down the Agent tool below depth two, so three levels of subagents is as deep as a session of its own goes; nothing here assumes that.

Codex threads point the other way. The Codex app has a multi-agent surface — create_thread, send_message_to_thread, read_thread and the rest — declared in each rollout's session_meta.dynamic_tools with a codex_app namespace and a full JSON inputSchema. Most are deferLoading, so a model that reached one through a tool search calls it codex_app__create_thread while a preloaded one is called bare; reading only one spelling misses every session that had to go looking.

The link between a thread and whoever spawned it is written only on the child. A thread the app spawns gets a rollout of its own alongside the parent's, and its session_meta carries parent_thread_id, thread_source: "subagent" and a session_id that is the root session rather than its own — while the parent's log says nothing about it at all. Read one file at a time, a run with subagents comes out as unrelated sessions filed on the same day.

A thread is a peer rather than a child: the app lists every thread the user owns in one sidebar whoever asked for it. So a thread hangs off the trajectory that first spoke to it and everyone else refers to it there, which is what makes a message from one agent to another agent's thread read as the two of them talking rather than as one containing the other. Copying the thread under each sender instead would count one agent twice and split what it was told across the copies.

What a thread tool returns is not declared anywhere, and on the machines this was written against no rollout has ever called one — the names appear only in the declaration list. So the request side is read from the schemas and the reply side is not invented: a new thread's id is taken from the ::created-thread{threadId="…"} directive the app instructs the model to echo in its next message, and the single inference — reading an id out of the result itself — is isolated in one function that fails closed. A result it cannot read costs the thread its id, which is honest; a looser reader picking a uuid out of prose would file one thread's work under another. A thread whose id never surfaces is still shown, because the delegation certainly happened.

Images. Codex embeds screenshots as base64 data URLs and Claude Code as base64 content blocks — 24 of the sessions on one test machine carried them, and a single Codex session held 65 images totalling 14 MB. Dropping them loses the thing the agent was actually looking at, and inlining them makes an unreadable document. atif-make writes them to images/ and references them by relative path, which is what the spec asks for.

Malformed timestamps. ATIF requires ISO 8601. A truncated or hand-edited log can carry something else, and passing it through would make the whole trajectory fail validation, so an unparseable timestamp is dropped rather than emitted.

HAR tool results. In a HAR capture a tool's output is not in the response that called it — it appears in the next request's message history. atif-make harvests results across entries and pairs them back by id, while emitting the shared conversation prefix only once.

Output — a trajectory is a directory, not a file

ATIF references images and split subagents by path relative to the trajectory file, so anything with attachments is inherently multi-file:

session.trajectory.json                 the document
session.trajectory.<agent-id>.json      subagents, with --split-subagents
images/<sha>.png                        images, referenced as "images/<sha>.png"

Images are de-duplicated by content hash, so the same screenshot pasted five times is stored once.

Three ways out, depending on where it's going:

atif-make session.jsonl -o out/t.json      # directory form: t.json + images/
atif-make session.jsonl --json             # one self-contained doc; images inlined as data: URIs
atif-make session.jsonl --bundle send.zip  # zip of the whole directory — for sending someone

--json is the exception that proves the rule: stdout has no directory to put siblings in, so images become data URIs to keep the document standalone.

Output carries timestamp, reasoning_content, per-step metrics, multimodal ContentPart message content, and subagents either embedded (subagent_trajectories) or split into sibling files with resolvable trajectory_path refs.

What this does not do

It converts, and stops there. No index, no library, no memory of what you have already looked at — those belong to whatever is doing the looking. In practice that is transcript-viewer, which depends on this package and keeps its own ~/.transcript-viewer/index.json.

The line is worth stating because it moved: the index used to live here, which meant the converter knew the viewer's directory (~/.transcript-viewer/opened) and its vocabulary for where a session came from, for the sake of a command conversion never needed. A converter should take one log — or an archive of them — and produce ATIF.

Discovery survives only as far as conversion requires it: convert.find walks a directory or an archive and reports what is convertible, with the format of each. Nothing is remembered between runs.

Tests

uv run pytest                      # unit tests
uv run --extra parquet pytest      # + the Parquet a published dataset ships as
uv sync --extra spec               # pulls harbor (large)
uv run --extra spec pytest         # + validate against the reference ATIF models

Fixtures for the agent formats are written by hand, small enough to read and reason about. The dataset fixtures are not: ATBench and MALT are real rows from the published files with only the prose shortened, because their shapes — a tampered tool description, a rater with empty content, a call written into a message, a record holding several conversations — are exactly what an invented fixture would have smoothed away. Each of those was found in the real data after a first parser had already been written against a summary of it.

The spec suite validates every fixture against harbor's own pydantic models — ground truth for whether the output is really ATIF, rather than what atif-make believes ATIF to be.