## Current Behavior

Running `nx show project` without specifying a project name fails, even
when inside a project directory:

```bash
cd packages/my-lib
nx show project
# Error: requires projectName argument
```

## Expected Behavior

When run from within a project directory, `nx show project` infers the
project from the current working directory:

```bash
cd packages/my-lib
nx show project        # Shows my-lib configuration and targets
nx show project --json # Outputs JSON for my-lib
```

Explicit project name still works:
```bash
nx show project other-project
```

If cwd is not within any project, shows a helpful error with usage
instructions.

### Changes
- `command-object.ts`: Make `projectName` positional arg optional
(`[projectName]`)
- `project.ts`: Infer project from cwd using `findProjectForPath` when
no project specified
- `project.spec.ts`: Add unit tests for cwd inference, nested
directories, root projects, and error cases

## Related Issue(s)

Fixes #31055

> [!WARNING]
>
> <details>
> <summary>Firewall rules blocked me from connecting to one or more
addresses (expand for details)</summary>
>
> #### I tried to connect to the following addresses, but was blocked by
firewall rules:
>
> - `repo.gradle.org`
> - Triggering command: `/usr/lib/jvm/temurin-17-jdk-amd64/bin/java
/usr/lib/jvm/temurin-17-jdk-amd64/bin/java
--add-opens=java.base/java.lang=ALL-UNNAMED
--add-opens=java.base/java.lang.invoke=ALL-UNNAMED
--add-opens=java.base/java.util=ALL-UNNAMED
--add-opens=java.prefs/java.util.prefs=ALL-UNNAMED
--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED
--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED
--add-opens=java.base/java.util=ALL-UNNAMED
--add-opens=java.prefs/java.util.prefs=ALL-UNNAMED
--add-opens=java.base/java.nio.charset=ALL-UNNAMED
--add-opens=java.base/java.net=ALL-UNNAMED
--add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED
--add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED
-XX:MaxMetaspaceSize=384m -XX:&#43;HeapDumpOnOutOfMemoryError -Xms256m
-Xmx512m -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en` (dns
block)
> - `staging.nx.app`
> - Triggering command: `/usr/local/bin/node node ./bin/post-install`
(dns block)
> - Triggering command: `/usr/local/bin/node /usr/local/bin/node
/home/REDACTED/work/nx/nx/node_modules/.pnpm/nx@22.2.0-beta.1_@swc-node&#43;register@1.9.1_@swc&#43;core@1.5.7_@swc&#43;helpers@0.5.11__@swc&#43;typ_e0638a3d25d549ce0cdd3a7d8bad3b61/node_modules/nx/src/project-graph/plugins/isolation/plugin-worker
/tmp/plugin3517-16-424.353971.sock @nx/enterprise-cloud` (dns block)
> - Triggering command: `/usr/local/bin/node /usr/local/bin/node
/home/REDACTED/work/nx/nx/node_modules/.pnpm/nx@22.2.0-beta.1_@swc-node&#43;register@1.9.1_@swc&#43;core@1.5.7_@swc&#43;helpers@0.5.11__@swc&#43;typ_e0638a3d25d549ce0cdd3a7d8bad3b61/node_modules/nx/src/project-graph/plugins/isolation/plugin-worker
/tmp/plugin4274-16-431.526748.sock @nx/enterprise-cloud` (dns block)
>
> If you need me to access, download, or install something from one of
these locations, you can either:
>
> - Configure [Actions setup
steps](https://gh.io/copilot/actions-setup-steps) to set up my
environment, which run before the firewall is enabled
> - Add the appropriate URLs or hosts to the custom allowlist in this
repository's [Copilot coding agent
settings](https://github.com/nrwl/nx/settings/copilot/coding_agent)
(admins only)
>
> </details>

<!-- START COPILOT CODING AGENT SUFFIX -->

<details>

<summary>Original prompt</summary>

>
> ----
>
> *This section details on the original issue you should resolve*
>
> <issue_title>Feature: allow `nx show targets` to infer project from
the cwd</issue_title>
> <issue_description>### Description
> When I'm already working inside a project's folder (for example
`github/abapify/packages/adk` that has its own `project.json`), I would
love to ask Nx to list the targets that belong to that project without
having to remember or type the project name. Ideally `npx nx show
targets` could detect the `project.json` in the current working
directory and operate on that project automatically.
>
> ### Current behavior
> Running the command from inside a project directory fails because the
CLI insists on a `--project` argument:
>
> ```
> $ cd github/abapify/packages/adk
> $ npx nx show targets
> Please provide a project name via --project=<name>
> ```
>
> ### Expected behavior
> If the current directory (or one of its ancestors) contains a
`project.json`, Nx should infer the project from that file and list the
targets without extra flags. This would make it much easier to explore
available targets while staying focused on a single project, especially
in large workspaces with many similarly named packages.
>
> ### Environment
> - Nx: 21.6.3
> - Node: 24.10.0
> - Package manager: bun 1.3.1
> - OS: WSL2 (Linux 6.6.87.2-microsoft-standard-WSL2)
> </issue_description>
>
> ## Comments on the Issue (you are @copilot in this section)
>
> <comments>
> </comments>
>

</details>

- Fixes #33503

<!-- START COPILOT CODING AGENT TIPS -->
---

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---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: AgentEnder <6933928+AgentEnder@users.noreply.github.com>
Co-authored-by: Craigory Coppola <craigorycoppola@gmail.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
(cherry picked from commit 6be0a7e)