add cli info [do not merge until mar 4th]

Author: Palashio

src/docs.json

@@ -191,6 +191,7 @@
                 {
                   "group": "Additional resources",
                   "pages": [
+                    "langsmith/langsmith-cli",
                     "langsmith/polly",
                     {
                       "group": "Data management",

src/langsmith/langsmith-cli.mdx

@@ -0,0 +1,165 @@
+---
+title: LangSmith CLI
+sidebarTitle: LangSmith CLI
+description: Query and manage LangSmith projects, traces, runs, datasets, evaluators, experiments, and threads from the terminal
+---
+
+The LangSmith CLI is a fast, agent-friendly command-line tool for working with your LangSmith data and workflows directly from the terminal. It’s designed for both humans and AI coding agents to list, filter, retrieve, and export data — with predictable JSON output by default and a pretty table mode for humans.
+
+<Callout icon="terminal" color="#504B5F">
+Built for agents and scripts: defaults to JSON, supports clean stdout/stderr separation, and offers `--yes` flags for non-interactive use.
+</Callout>
+
+## Installation
+
+Choose any method below.
+
+<CodeGroup>
+```bash Install script (recommended)
+curl -sSL https://raw.githubusercontent.com/langchain-ai/langsmith-cli/main/scripts/install.sh | sh
+```
+
+```bash Install to a custom directory
+INSTALL_DIR=$HOME/.local/bin \
+  curl -sSL https://raw.githubusercontent.com/langchain-ai/langsmith-cli/main/scripts/install.sh | sh
+```
+
+```bash GitHub Releases
+# Download the latest binary for your platform
+# https://github.com/langchain-ai/langsmith-cli/releases
+```
+
+```bash Go install
+go install github.com/langchain-ai/langsmith-cli/cmd/langsmith@latest
+```
+</CodeGroup>
+
+## Authentication
+
+Set your API key as an environment variable:
+
+```bash
+export LANGSMITH_API_KEY="lsv2_..."
+```
+
+Optional defaults:
+
+```bash
+export LANGSMITH_ENDPOINT="https://api.smith.langchain.com"  # self-hosted/hybrid
+export LANGSMITH_PROJECT="my-default-project"                 # default project for queries
+```
+
+Or pass them as flags when running commands:
+
+```bash
+langsmith --api-key lsv2_... trace list --project my-app
+```
+
+## Quickstart
+
+Common tasks to get oriented:
+
+```bash
+# List tracing projects (sessions)
+langsmith project list
+
+# List recent traces in a project
+langsmith trace list --project my-app --limit 5
+
+# Get a specific trace with full detail
+langsmith trace get <trace-id> --project my-app --full
+
+# List LLM runs with token counts
+langsmith run list --project my-app --run-type llm --include-metadata
+
+# Datasets and experiments
+langsmith dataset list
+langsmith experiment list --dataset my-eval-set
+
+# Conversation threads in a project
+langsmith thread list --project my-chatbot
+```
+
+## Output formats
+
+- Default: JSON to stdout for easy piping and scripting
+- Pretty tables: `--format pretty` for human-readable tables and trees
+- Write to file: `-o <path>`
+
+```bash
+langsmith trace list --project my-app                  # JSON array to stdout
+langsmith --format pretty trace list --project my-app  # tables/trees
+langsmith trace list --project my-app -o traces.json   # write JSON to file
+```
+
+## Commands overview
+
+The CLI groups functionality by resource. Each command supports filters like `--limit`, `--last-n-minutes`, and more.
+
+<AccordionGroup>
+  <Accordion title="project — list tracing projects" icon="folders">
+
+```bash
+langsmith project list                    # default limit: 20
+langsmith project list --name-contains chatbot
+langsmith --format pretty project list
+```
+  </Accordion>
+
+  <Accordion title="trace — query and export traces" icon="route">
+
+```bash
+langsmith trace list --project my-app --limit 50 --last-n-minutes 60
+langsmith trace list --project my-app --error --include-metadata
+langsmith trace get <trace-id> --project my-app --full
+langsmith trace export ./traces --project my-app --limit 20 --full
+```
+  </Accordion>
+
+  <Accordion title="run — query individual runs" icon="list-details">
+
+```bash
+langsmith run list --project my-app --run-type llm
+langsmith run list --project my-app --run-type tool --name search
+langsmith run get <run-id> --full
+langsmith run export llm_calls.jsonl --project my-app --run-type llm --full
+```
+  </Accordion>
+
+  <Accordion title="thread — query conversation threads" icon="messages">
+
+```bash
+langsmith thread list --project my-chatbot --last-n-minutes 120
+langsmith thread get <thread-id> --project my-chatbot --full
+```
+  </Accordion>
+
+  <Accordion title="dataset — manage evaluation datasets" icon="database">
+
+```bash
+langsmith dataset list --name-contains eval
+langsmith dataset get my-dataset
+langsmith dataset create --name my-eval-set --description "QA pairs for v2"
+langsmith dataset export my-dataset ./data.json --limit 500
+```
+  </Accordion>
+
+  <Accordion title="evaluator — manage evaluators" icon="scale">
+
+```bash
+langsmith evaluator list
+langsmith evaluator upload evals.py --name accuracy --function check_accuracy --dataset my-eval-set
+langsmith evaluator delete accuracy --yes
+```
+  </Accordion>
+
+  <Accordion title="experiment — results and summaries" icon="chart-bar">
+
+```bash
+langsmith experiment list --dataset my-eval-set
+langsmith experiment get my-experiment-2024-01-15
+```
+  </Accordion>
+</AccordionGroup>
+
+