Two get-by-ID ergonomics features, both resolved client-side because the API lacks the endpoints.

tools get accepts numeric IDs (#69)

The get endpoint is name-keyed (/api/v1/tools/{tool_name} is all the spec offers), but tools list leads with an ID column — copying it produced 404: Tool with name 425 not found. Per the issue's stated preference ("accept either"):

1. Try by name first (zero overhead for the normal path — one request).
2. On a 404 with an all-digits arg, resolve ID → name via the list endpoint's id search (search_fields=id, exact client-side match in case the server matches substrings) and retry.
3. Unknown IDs surface the original 404 — which now also carries the context-aware hint from fix: pure JSON schema output, byte-safe takeouts, context-aware 404 hints #88: "This command takes a name, not a numeric ID — copy the NAME column from syllable tools list."

Also fixes the misleading help examples (tools get 5 → tools get my_tool, same for update/delete — all three are name-keyed).

syllable channels get <channel-id> (#70)

New command for parity with every other resource. The API has no by-ID GET for channels (the {channel_id} path only supports DELETE — see the triage note on the issue), so this resolves via the list endpoint's id search and prints the matching item — exactly the shape of a single item from channels list -o json, as the issue requested. Not-found exits 1 pointing at channels list. The help text documents the client-side mechanism; if the platform adds a by-ID GET later, spec drift will flag it and the command can switch over.

Verification

Unit tests (stub server): fallback chain (name-miss → id-resolve → name-get), by-name single-request, unknown-ID keeps original 404, channels exact-match-wins (ids 4 vs 40), channels not-found.

Live against the cli-test org:

$ syllable --org cli-test tools get 523        → resolves to web_search ✓
$ syllable --org cli-test channels get 76      → Syllable Web Chat ✓
$ syllable --org cli-test channels get 999     → exit 1, "run `syllable channels list`" ✓

Closes #69
Closes #70

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