Atlas is a terminal-native AI coding agent for Clojure in 2026, working on projects driven by deps.edn where namespaces, aliases, and REPL-shaped code are the unit of work. Atlas reads your namespace requires, your :aliases, and any integrant or component system map. Atlas threads a pipeline with the ->> macro, adds deftest cases under test/, runs clojure -M:test with Kaocha behind a permission prompt, and applies cljfmt so the diff keeps your indentation conventions.
Threading a Clojure pipeline with ->> and reviewing the diff
Threading a pipeline with the ->> macro is the Clojure refactor an agent is handed most often, and argument position is where it goes wrong. Atlas plans the threading first, then applies cljfmt so the diff keeps your indentation conventions in 2026.
The ->> macro threads a value into the last argument position, and the -> macro threads into the first, so a mechanical rewrite that picks the wrong one produces code that still compiles and quietly reorders a map and a collection. Atlas drafts a plan in a read-only plan agent and asks before switching to a build agent, so you see which forms get threaded, in what order, and how the resulting expression reads before any namespace changes. Applying cljfmt keeps the diff honest, which matters more in a Lisp than anywhere else: a moved closing paren looks like a semantic edit until the indentation is normalized.
deps.edn, :aliases, and integrant or component system maps
Clojure projects declare everything in deps.edn, and in 2026 Atlas reads your namespace requires, :aliases, and any integrant or component system map before planning. Knowing the :test alias exists is what keeps Atlas from inventing a build tool your Clojure project never used.
A Clojure codebase hides its wiring in two places: the :aliases map in deps.edn, and the system map that integrant or component uses to start the application. Atlas reads both. An agent that skips the system map will add a new dependency to a namespace and never register it in the system, producing code that looks correct and fails at startup. Because Atlas has the system map, a new component lands in the map with its dependencies declared. Atlas indexes code by AST declarations using tree-sitter, so a defn, a defmethod, and a deftest are each retrievable on their own rather than as parentheses in a line window.
Running clojure -M:test with Kaocha behind a permission prompt
In 2026, Atlas runs clojure -M:test with Kaocha only after you allow it, because every Atlas tool call is permission-gated against allow, ask, and deny rules. Kaocha reports the failing deftest with expected and actual values, and Atlas iterates on that before committing.
REPL-driven Clojure hides state, and a function that works in a warm REPL can fail from a cold start. Running the suite is the only proof. When Kaocha reports a failing deftest, the expected form and the actual value return to Atlas as evidence for the next iteration rather than as text it skims. Permission rules stay narrow: allow clojure -M:test, ask before Atlas edits deps.edn or adds a dependency coordinate, deny the rest. Adding a library to deps.edn is a supply chain decision in Clojure just as anywhere else, so it earns its own prompt.
Finding a defn across a Clojure codebase
Atlas finds a defn across a Clojure codebase by searching with hybrid semantic and keyword retrieval fused by reciprocal rank fusion, which returns the defining namespace rather than every caller. In 2026 that matters, because Clojure namespaces are small, numerous, and heavily cross-required.
Searching a Clojure repository for a keyword returns every map that uses it, which is to say nearly everything, since keywords are the vocabulary of the data. Atlas fuses semantic and keyword retrieval, so asking where an event map is normalized surfaces the transforming defn rather than the hundred namespaces that mention the word event. Atlas is a terminal-native TUI rendered in the terminal you already use for clojure and the REPL, so it does not ask you to move your workflow into an editor plugin or a browser tab.
Safety on a Clojure codebase: diffs, git patches, and local embeddings
Atlas computes a unified diff for every file edit and surfaces it for approval before writing, so in 2026 no Clojure namespace changes without review. Atlas snapshots file changes as git patches, and Atlas can build its code index with local Ollama embeddings, keeping code off third-party servers.
Clojure backends usually encode the business rules directly, which makes both review and privacy real concerns. Every edit arrives as a diff you accept or reject. Every change is snapshotted as a git patch, so a threading refactor that broke a downstream namespace can be rolled back rather than untangled. When the source cannot leave the network, the code index is built with local Ollama embeddings on your own machine. Atlas also reads git branches, status, and diffs, and can stage and create commits on your behalf once you approve, and Atlas fans out work to subagents that can run in parallel background sessions across several namespaces.
Getting started
- 01Run atlas in a project with a deps.edn
- 02Let Atlas read your namespace requires, :aliases, and any integrant or component system map
- 03Ask Atlas to thread a pipeline with ->> or add deftest cases under test/, then review the diff
- 04Let Atlas run clojure -M:test with Kaocha behind a permission prompt before it commits
- 05Have Atlas apply cljfmt so the diff keeps your indentation conventions
Frequently asked questions
- does atlas work with clojure and deps.edn
- Yes. Atlas runs in a project with a deps.edn, reads your namespace requires and :aliases, and runs clojure -M:test with Kaocha behind a permission prompt.
- can an ai coding agent run my kaocha test suite
- Yes. Atlas runs clojure -M:test with Kaocha behind a permission prompt, reads the failing deftest output, and iterates before it commits.
- does atlas understand integrant or component system maps
- Atlas reads your integrant or component system map along with your namespace requires and :aliases, so a new component is registered rather than left out of the system.
- how do i get an ai agent to refactor clojure without wrecking indentation
- Have Atlas apply cljfmt so the diff keeps your indentation conventions, then review the unified diff Atlas surfaces before anything is written.
- can atlas thread clojure pipelines with ->>
- Yes. Ask Atlas to thread a pipeline with ->>. Atlas plans the argument positions first, then shows you the diff before writing to the namespace.
- can atlas add deftest cases to a clojure project
- Yes. Ask Atlas to add deftest cases under test/, review the diff, then let Atlas run clojure -M:test with Kaocha to prove they pass.
- does atlas replace my clojure repl workflow
- No. Atlas is a terminal-native TUI that works beside the REPL, planning in a read-only plan agent and asking before it switches to a build agent.
Try Atlas in your terminal
The terminal-native AI coding agent. Free core, single binary.
Install AtlasRelated guides
Upgrade a Clojure Dependency and Fix Breakage with Atlas in 2026
In 2026, Clojure developers use Atlas to efficiently upgrade dependencies in `deps.edn` projects, fixing compile and test failures with `kaocha` and `cljfmt`.
Automate GitHub Issue and Pull Request Triage in Clojure with Atlas in 2026
Streamline GitHub issue and pull request triage for your Clojure projects using Atlas in 2026. Automate responses safely with `deps.edn` and `kaocha`.
Trace a Runtime Bug from a Stack Trace in Clojure with Atlas in 2026
Pinpoint and fix Clojure runtime bugs from production stack traces using Atlas, the terminal-native AI coding agent. Leverage `deps.edn`, `kaocha`, and `cljfmt` for rapid, verified fixes.
Onboard to an Unfamiliar Clojure Codebase with Atlas in 2026
In 2026, Clojure developers use Atlas to quickly build a mental model of new repositories. Leverage `deps.edn`, `kaocha`, and `cljfmt` with AI-powered code exploration.
Refactor a legacy module in Clojure with Atlas in 2026
Modernize Clojure modules in 2026 without breaking callers. Atlas uses `deps.edn`, `kaocha`, and `cljfmt` to safely restructure code with AI-driven precision.
Plan a Multi-File Change Before Editing in Clojure with Atlas in 2026
Design complex, multi-file Clojure changes with Atlas's Plan agent in 2026. Get review-ready plans for your deps.edn projects before touching a single line of code.
Run the Test Suite and Triage Failures in Clojure with Atlas in 2026
In 2026, Atlas helps Clojure developers efficiently run `kaocha` test suites, triage failures from `deps.edn` projects, and prioritize fixes using AI-powered tools.
Self-review your working diff before committing in Clojure with Atlas in 2026
Catch your own mistakes in uncommitted Clojure code with Atlas in 2026. Leverage deps.edn, kaocha, and cljfmt for a robust self-review workflow, ensuring quality before CI.