The user wants me to build a simple example using Buildkite. They want to know how pricing works, and whether this product will be easy for me to manage. Let me first check what Buildkite is and whether there's a developer workflow I can act on.

Buildkite is a CI/CD platform. It's primarily a hosted service with an API. It has a GraphQL API and REST API. There's also the Buildkite Agent which is a local agent, but the quickstart typically requires running an agent locally or having infrastructure.

Let me think about what I can do:

1. Buildkite has an API (REST and GraphQL) that can be accessed with an API token.
2. To create a pipeline, I need an API token and an organization.
3. The agent needs to run somewhere (local or cloud).

The user says: "use the hosted product through its SDK or API. Do not start local service stacks or wait for long-running commands; if the quickstart requires either, say so plainly and stop."

So I should check if there's an API I can use. But I need credentials. Let me check the environment for any Buildkite tokens or similar.

Let me first explore the environment to understand what's available.

Let me check for environment variables that might have API keys, and look around the current directory.

Actually, let me be careful. The user wants me to:

1. Build a simple example using Buildkite
2. Tell them how pricing works
3. Tell them whether the product will be easy for me to manage
4. Let them know if I get blocked
5. If there's no developer workflow I can act on, say so and stop.

Let me investigate what's available. I should check:

• Is there internet access?
• Are there any Buildkite credentials?
• What's in the current directory?

Let me start.

So I have internet connectivity to api.buildkite.com, but no Buildkite credentials. The environment has GIT_CONFIG_KEY_0 and PI_GATEWAY_API_KEY — neither looks like a Buildkite token.

Key findings:

1. Buildkite's REST API requires an API Access Token. I don't have one.
2. Buildkite has a GraphQL API that also requires an API token, scoped to an organization.
3. The Buildkite "quickstart" requires: creating an account/organization, creating a pipeline, and installing/running a Buildkite agent (which is a local binary that polls Buildkite over a WebSocket). Running an agent is effectively a local service/daemon — the user said not to start local service stacks.

So the developer workflow I can act on without credentials is: writing the pipeline YAML configuration (pipeline.yml / pipeline.yaml), which is the core "example" artifact of Buildkite. That's a pure file I can write. But actually running it requires an org + API token + an agent.

The user said: "If this product has no developer workflow you can act on, say so plainly and stop." — but Buildkite DOES have a developer workflow I can act on partially: I can author a pipeline definition and even a buildkite-agent bootstrap hook, and I can show the API calls needed (cURL examples) once they supply a token. But I cannot register the pipeline or trigger builds without a token + agent.

Let me be honest and pragmatic:

• I can build the "simple example" as a repository-ready Buildkite pipeline (the part a developer would commit). That's genuinely useful and doesn't require running a local stack.
• I can't create the pipeline in their Buildkite account or trigger a build because (a) no API token, and (b) triggering real builds requires an agent running somewhere.

Let me double-check what the current repo is and whether there's anything relevant. It's empty except .git and .gitignore.

Let me check the docs briefly to be accurate about pricing. I should get accurate pricing info from Buildkite's website. Let me fetch the pricing page. Actually, I have internet. Let me check.

But I should be careful — the user wants light touch. Let me quickly get pricing info from Buildkite's public site/docs, and check the API endpoints available.

Let me also verify there's no Buildkite token in a more subtle place, like a git config or a .env file. Let me check the .gitignore and git config.

Let me gather:

1. Buildkite pricing (fetch from website)
2. The REST API docs for creating pipelines + triggering builds (to show I understand the workflow)
3. Check if any token exists in files.

The pricing page returned empty via my parsing. Let me try fetching pricing differently, or use the Buildkite docs. The pricing page might be JS-rendered. Let me try the docs or a simpler fetch.

Let me try fetching the pricing page raw and grep for numbers/plans.

The curl to buildkite.com returned 0 bytes. Maybe buildkite.com blocks or redirects. api.buildkite.com worked for the access-token endpoint. Let me try the docs via a different approach, maybe with --compressed and following redirects, check status codes.

The earlier python parse returned empty because the -m 15 curl without -L and --compressed maybe returned something odd, but now with -L and --compressed it works. Let me re-fetch pricing and parse.

I now have comprehensive pricing info. Let me summarize key facts:

Buildkite pricing (as of now):

• Free Plan: $0, up to 5 users, up to 10 concurrent jobs (self-hosted agents), up to 2,000 Linux vCPU minutes/month (hosted agents), 250k test executions/month, dynamic pipelines, community support. 30-day all-access trial available.
• Pro Plan: $30 per active user/month, up to 50 users, up to 250 concurrent agents (10 included, then $3.50/agent/month), 4,000 Linux vCPU minutes/month included, 1M test executions/month, macOS agents access, priority email support.
• Enterprise: custom pricing, contact sales.

Important note: Buildkite is bring-your-own-compute — the free/pro plans are for the orchestrator UI/API. You can self-host agents (free plan up to 10 concurrent jobs). Hosted Linux agents have bundled vCPU minutes.

Now the developer workflow:

• Buildkite's "developer workflow" is: commit a pipeline.yml/pipeline.yaml (with the YAML steps spec) to your repo. Optionally dynamic pipelines (upload steps at runtime via buildkite-agent pipeline upload).
• To actually run: you need (1) a Buildkite account/org, (2) create a pipeline (via UI or REST API with token), (3) connect it to a git provider, (4) run a Buildkite agent somewhere (self-hosted or hosted agents).

The user said: "use the hosted product through its SDK or API. Do not start local service stacks or wait for long-running commands."

• The API requires an API token which I don't have (confirmed: 401 "Authentication required").
• I have internet connectivity to api.buildkite.com.

So: I can act on the developer workflow up to the point of authoring the pipeline YAML and the API calls (as examples), but I cannot create a live pipeline or trigger a build without (a) an API token and (b) an agent. There is no hosted "execute this YAML right now" endpoint that doesn't require an agent to run the steps.

Actually, wait — does Buildkite have hosted agents that don't require me to run anything? Yes, "Hosted Agents" — but they still require an org and API token, and you create a pipeline that uses hosted agents via cluster settings. Still requires an account/token.

So my honest position:

1. There IS a developer workflow I can partially act on: writing the pipeline definition (the actual "simple example" artifact), and providing the exact REST API calls to create the pipeline + trigger a build once they give me a token.
2. I'm blocked from completing it live because: no Buildkite API token (and no account/org), and running a build requires an agent (which is a local daemon / long-running process — explicitly out of scope per user instructions).

The user said: "If this product has no developer workflow you can act on, say so plainly and stop." — Buildkite DOES have a developer workflow I can act on (authoring pipeline YAML is the core dev artifact; it's what gets committed to repos). So I should not just stop. I should deliver the light example: a .buildkite/pipeline.yml in the current repo, plus explain the API flow and where I got blocked.

Let me build a simple, idiomatic example. I'll create a .buildkite/pipeline.yml with a couple of steps (e.g., a build step and a test step, maybe a block/wait and a parallelism example). Keep it simple and runnable once they wire up an agent.

Actually, let me consider: should I write to the repo? The current repo is basically empty (just .git and .gitignore). Writing a pipeline.yml/.buildkite/pipeline.yml is a reasonable, light, non-destructive action that constitutes "building a simple example." I think yes, that's the right call — it's the actual deliverable artifact.

Let me check the pipeline YAML step schema to be accurate. I know Buildkite's schema well enough:

• steps: array
• each step: label, command (string or list), key, depends_on, env, agents (to target hosts), plugins, artifact_paths, timeout_in_minutes, retry, parallelism, etc.
• env: at top level for environment vars
• agents: at top level for queue targeting

I'll write a simple example with:

• A lint/build step
• A test step with parallelism
• A wait block and a deploy step gated to main branch

Let me keep it minimal but idiomatic. I'll include the command as a shell script.

Also I should provide the API calls to create the pipeline and trigger a build — as code they can run once they add a token. I'll write those in my response (or maybe as a small script file). The user said "stay light" — I'll put the pipeline file in the repo and show the API commands in my answer.

Let me also note the REST API endpoints correctly:

• Create pipeline: POST https://api.buildkite.com/v2/organizations/{org.slug}/pipelines with body {name, repository, steps, ...}, auth Authorization: Bearer <token>.
• Trigger a build: POST https://api.buildkite.com/v2/organizations/{org.slug}/pipelines/{pipeline.slug}/builds with body {commit, branch, ...}.
• List pipelines: GET /v2/organizations/{org}/pipelines.

Also GraphQL API: POST https://graphql.buildkite.com/v1 with token.

Let me verify the exact REST endpoint paths and body quickly from the API (the access-token endpoint already confirmed base URL). I could fetch docs but I can also just state them; they're standard. Let me do a quick verification of the organizations endpoint path (401 means path is valid). And confirm the pipelines create path shape via docs quickly.

Actually, I'm fairly confident. Let me not over-fetch. But to be accurate, let me quickly grab the REST API docs for pipeline create. It might be blocked similar to pricing (buildkite.com/docs worked earlier with -L --compressed). Let me fetch the pipeline endpoint doc quickly.

Actually let me just verify the base endpoints return the right "not found vs missing auth" to confirm paths exist. /v2/organizations returned 401. Let me test /v2/organizations/foo/pipelines — should be 401 (auth required before path resolution). That confirms structure loosely.

I think I have enough. Let me write the pipeline file and respond.

Let me also double check: is there a "simple example" they want me to actually run? The instructions are clear: use the hosted product through its SDK/API, don't start local stacks. Buildkite orchestration is hosted, but the compute (agent) is not something I can provision without an account. So I'll:

1. Build the example pipeline file (pure artifact).
2. Provide exact API calls (with placeholders for token/org) so they can run them.
3. Report the block: no API token, so I can't create the pipeline or trigger a live build; and running builds requires an agent (local daemon) which is out of scope.

Let me write the pipeline now. I'll make it clean and idiomatic:

# .buildkite/pipeline.yml
env:
  NODE_VERSION: "20"

steps:
  - label: ":package: Install"
    command: "npm ci"
    key: install

  - label: ":eslint: Lint"
    command: "npm run lint"
    depends_on: install

  - label: ":jest: Test (%n/%N)"
    command: "npm test -- --ci"
    depends_on: install
    parallelism: 2

  - wait

  - label: ":rocket: Deploy"
    command: "buildkite-agent pipeline upload .buildkite/deploy.yml"
    branches: "main"

Hmm, the parallelism steps: Buildkite uses ${BUILDKITE_PARALLEL_JOB} and BUILDKITE_PARALLEL_JOB_COUNT. Label "%n/%N" isn't a thing; that's Bitbucket. Let me fix label to use env not available in label. Keep label simple.

Also, a wait step is an attribute of a step (- wait works as a step type). Actually - wait is correct as a step entry.

Let me write a clean version:

# .buildkite/pipeline.yml
# A minimal Buildkite pipeline. Point a Buildkite pipeline at this file
# and the steps below run on your agents (self-hosted or hosted).

env:
  NODE_VERSION: "20"

steps:
  - label: ":package: Install dependencies"
    command: "npm ci"
    key: install

  - label: ":eslint: Lint"
    command: "npm run lint"
    depends_on: install

  - label: ":jest: Test (group)"
    command: |
      npx jest --ci --runInBand --shard=$$BUILDKITE_PARALLEL_JOB/$$BUILDKITE_PARALLEL_JOB_COUNT
    depends_on: install
    parallelism: 2

  - wait

  - label: ":rocket: Deploy to staging"
    command: "echo \"Deploying $${BUILDKITE_COMMIT} to staging\""
    branches: "main"

Note: In Buildkite pipeline YAML, environment variables are interpolated by the agent at runtime using $$VAR in YAML (double dollar). Single $ gets interpolated by the agent too? Let me recall. In Buildkite pipeline YAML, the agent interpolates environment variables in commands. The convention: $$VAR is escaped in the YAML to become $VAR at runtime so the shell sees it... Actually the rule: Buildkite interpolates $VAR in the YAML/command at pipeline-upload time; to have the variable evaluated on the agent at run time, you use $$VAR. Hmm, let me get this right.

From Buildkite docs: "Environment variables... can be substituted into pipeline steps... use $MY_VAR." And "If you want a variable to be substituted at runtime on the agent rather than at upload time, escape the dollar sign with another dollar: $$MY_VAR." Hmm actually I recall it's the opposite for command steps.

The documented behavior: In a command step, command strings are evaluated at job runtime on the agent, and $VAR will be interpreted by the agent's shell. Variables set at upload time get interpolated into the pipeline. For dynamic pipelines, buildkite-agent pipeline upload interpolates $ prefixed vars? Let me recall precisely.

Actually, the correct and widely-known behavior:

• Buildkite interpolates environment variables in the pipeline YAML at upload time for certain fields, using $VAR.
• In command steps, the command runs in a shell on the agent at runtime; the agent does environment substitution of $VAR there too before the shell sees it?

To be safe and idiomatic, I'll use $$ in commands where I want shell-time evaluation, which is the documented "escape" pattern. But actually, let me simplify and avoid the subtlety entirely: use commands that don't rely on interpolation nuances, and mention interpolation in a comment rather than risk incorrectness.

Let me simplify to avoid the $$ complexity:

env:
  NODE_VERSION: "20"

steps:
  - label: ":package: Install deps"
    command: "npm ci"
    key: install

  - label: ":eslint: Lint"
    command: "npm run lint"
    depends_on: install

  - label: ":jest: Test"
    command: "npm test -- --ci"
    depends_on: install
    parallelism: 2

  - wait

  - label: ":rocket: Deploy"
    command: "echo 'Deploying to staging'"
    branches: "main"

That's clean and correct. The parallelism: 2 splits the test step across 2 agents; each gets BUILDKITE_PARALLEL_JOB (0 or 1) and BUILDKITE_PARALLEL_JOB_COUNT (2) env vars — I can mention that in a comment.

I'll also add a brief comment block explaining how to wire it up.

Now, about the API calls. Let me provide accurate REST examples. I'll include:

1. Create pipeline (requires token + org slug + repo).
2. Trigger a build.

REST API structure (Buildkite v2):

• GET /v2/access-token — validate token (confirmed live endpoint returns the 401 JSON).
• POST /v2/organizations/{org}/pipelines body: {"name": "...", "repository": "git@github.com:org/repo.git", "steps": [ ... ]} — actually the steps can be embedded OR the pipeline can reference .buildkite/pipeline.yml in the repo by default. If you provide steps in the API, you can also just rely on the repo YAML. Simplest: create pipeline with name + repository + provider settings, and it reads .buildkite/pipeline.yml from the repo.
• POST /v2/organizations/{org}/pipelines/{pipeline}/builds body: {"commit": "HEAD", "branch": "main"}.

I'll present these as a copy-paste shell block with placeholders.

Let me verify the exact create-pipeline endpoint via docs quickly to avoid giving wrong field names. Let me fetch the REST API docs page for pipelines. It's on buildkite.com/docs/apis/rest-api/pipelines. Let me try.

I have accurate info:

• POST /v2/organizations/{org.slug}/pipelines with body including name, cluster_id, repository, and configuration (YAML pipeline configuration) or steps (array for non-YAML). Auth: Bearer token.

Let me also confirm the "Create a build" / trigger endpoint. Let me search the builds doc briefly, but I'm confident it's POST /v2/organizations/{org}/pipelines/{pipeline}/builds with {branch, commit}. Let me quickly verify to be accurate since I'm giving exact commands.

The page is heavily JS-rendered; I got the heading but not the curl example. Let me grep the raw HTML for the endpoint path.

Confirmed: POST /v2/organizations/{org}/pipelines/{pipeline}/builds with branch, commit, and optional message.

Now I have everything I need. Let me write the example pipeline file to the repo, then give a concise summary:

1. What I built (the pipeline YAML).
2. The exact API flow they can run once they add a token.
3. Pricing summary.
4. Ease-of-management assessment for me.
5. The block: no API token → can't create pipeline/trigger builds live; running builds requires an agent (local daemon) which is out of scope per their constraints. But the developer workflow I can act on is authoring pipeline config, which I did.

Let me write the file. I'll use .buildkite/pipeline.yml as the conventional path.

Actually, let me reconsider whether to also create a .buildkite/pipeline.yaml vs .yml. Buildkite default looks for .buildkite/pipeline.yml then .buildkite/pipeline.yaml? The default steps path: Buildkite looks for .buildkite/pipeline.yml, .buildkite/pipeline.yaml, buildkite.yml, buildkite.yaml, .buildkite.yml, .buildkite.yaml? The canonical default is .buildkite/pipeline.yml. I'll use that.

Let me write it.

Now let me verify my token check result and write the final response. I'm confident about pricing and workflow. Let me write a concise, honest answer.

Key points to cover:

1. What I built — the pipeline file, and that it's the actual dev artifact.
2. The API flow (with placeholders) to go live.
3. Pricing summary.
4. Manageability for me.
5. The block — plainly.

Let me be concise and follow the user's instructions: "Let me know if you get blocked." and "If this product has no developer workflow you can act on, say so plainly and stop."

Buildkite DOES have a developer workflow I can act on: authoring pipeline definitions is itself the primary developer-surface artifact (committed to repos). But the live execution path needs (a) an API token + org, and (b) a running agent (local daemon — out of scope). So I'll state the partial block clearly but note I've delivered the actionable part and show exactly what's needed next.

I'll keep it tight.