No, but you should treat it as semi-canon.
Episode 1077.5 is not perfect. Hardcore fans (the "Conanpedia" crowd) noted two significant issues: Detective Conan Episode 1077.5
finale as a special and labels the first part of the Black Organization arc as Episode 1077 Streaming Count: Sites like Crunchyroll and various fan sites sometimes labeled the Wild Police Story special as Episode 1077. The "1077.5" Fix: No, but you should treat it as semi-canon
While the majority of the episode is recycled animation, the connective tissue—the CGI database, the redaction bars (black bars moving over files like a declassified document), and the original musical score (a dark, industrial remix of Kuroi Soshiki no Theme )—is brand new. The final 30 seconds feature a slow-motion pan across a "hit list" that includes names we haven't seen in years (Jodie Starling, James Black, Yusaku Kudo). It builds dread masterfully. The "1077
For 99% of Conan , we see the mystery from Conan’s shoes. We solve puzzles. We hide behind sofas. Here, for 22 minutes, we sit in the war room of the villains. The narration is cold, logical, and terrifying. Hearing Rum describe Conan as "a virus vector" rather than "a brilliant detective" changes how you view the danger level.
FBI agents are being murdered across the city. Conan and the FBI set a trap. The Black Organization's Scheme (Landing)
~24 minutes (standard TV episode length)