implement :lookup filter

docs/src/reference/filters.md

@@ -114,6 +114,11 @@ commits that don't match any of the other shas.
 Produce the history that would be the result of pushing the passed branches with the
 passed filters into the upstream.
 
+### Start filtering from a specific commit **:from(<sha>:filter)**
+
+Produce a history that keeps the original history leading up to the specified commit `<sha>` unchanged,
+but applies the given `:filter` to all commits from that commit onwards.
+
 ### Prune trivial merge commits **:prune=trivial-merge**
 
 Produce a history that skips all merge commits whose tree is identical to the first parents

josh-cli/Cargo.toml

@@ -21,3 +21,4 @@ clap = { workspace = true }
 rs_tracing = { workspace = true }
 juniper = { workspace = true }
 git2 = { workspace = true }
+toml = { workspace = true }